Quick Load Request 7PRC 175g Nosler ABLR

[prsjohnb]

I am new to this group and trying to find my way around. What I am doing is starting down the road of finding a load for my Seekins PH3 in 7PRC with a 22in barrel and Omega300 suppressor. I am looking to have it be as accurate as possible out to 600 yards and work in a range of temps from 90deg down to 15deg. If someone can help me with maybe a QuickLoad chart and/or any personal wisdom, that would be wonderful. I worked up two initial loads in Gordons and their results are attached in the pics. From looking at things though, it seems those grain weights are over book max. Just for the record though, I had zero pressure signs in shooting those on a 70 degree day.

 

[SJB358]

If you’re not seeing pressure and you’re not over book velocities then I wouldn’t worry about it. Both of those powders should be excellent for what you’re trying to do and honestly if they shoot for you, that 175 ABLR has creeped in to become my favorite 7mm bullet for my 7 Mashburn Super. Such an effective elk and deer bullet.

 

[prsjohnb]

If you’re not seeing pressure and you’re not over book velocities then I wouldn’t worry about it. Both of those powders should be excellent for what you’re trying to do and honestly if they shoot for you, that 175 ABLR has creeped in to become my favorite 7mm bullet for my 7 Mashburn Super. Such an effective elk and deer bullet.

So what is your thoughts on what you see in the groups and velocity’s? Do you see a charge range you would consider testing further? I had someone else tell me that when you see the velocity flatten out or drop in one shot ladders, that tends to lead to higher ESs when you shoot groups.

 

[sako2]

Looks like 8,9,10, is the best group. With Retumbo. Same with H1000. You will usually see 2 nodes 1 at the lower end of charge weight and 1 at the higher end.

 

[SJB358]

So what is your thoughts on what you see in the groups and velocity’s? Do you see a charge range you would consider testing further? I had someone else tell me that when you see the velocity flatten out or drop in one shot ladders, that tends to lead to higher ESs when you shoot groups.

Not saying it’s right or wrong, but most of the speeds that “flatten” at the top end of the loads are usually useful for me. I’ve been tricked so many times seeing a node lower down the ladder that just wasn’t great for ES. Being as there is about a grain between your two nodes with Retumbo I’d almost try both of them. Both the recorded speeds are practical top end.

Same for the H1000 load at the top end. That looks like a good one. I sorta think seeing it flatten is a component of load density which makes the slow burning powders happy at the top end of the pressure curve.

I could be all ate up, but that is what works for me.

 

[Idaho53]

Sako2 and SJB358 gave great advice for you. I have loaded for (6) different 7 PRC rifles (22" and 24" tubes), and all of them love the H1000 with 67.5 to 68 grains of powder. Have only loaded 175 grain bullet for each rifle with velocities at 2900 to 2950 fps (using Athlon Radar). All of these rifles shoot 1/2 MOA at 600 yards very consistently. In my experience, the best way to lower ES/SD is by adjusting seating depth. Now that you have some node/charges to follow, I would suggest adjusting seating by .005" and see what that does. ABLR shoot like solids and seem to like a jump, but closer seating depth may lower ES/SD.

 

[SJB358]

Sako2 and SJB358 gave great advice for you. I have loaded for (6) different 7 PRC rifles (22" and 24" tubes, and all of them love the H1000 with 67.5 to 68 grains of powder. Have only loaded 175 grain bullet for each rifle with velocities at 2900 to 2950 fps (using Athlon Radar). All of these rifles shoot 1/2 MOA at 600 yards very consistently. In my experience, the best way to lower ES/SD is by adjusting seating depth. Now that you have some node/charges to follow, I would suggest adjusting seating by .005" and see that that does. ABLR shoot like solids and seem to like a jump, but closer seating depth may lower ES/SD.

That’s spot on as well in regards to seating depth. My gun loves .075 off. Just hammers right there.

 

[prsjohnb]

Sako2 and SJB358 gave great advice for you. I have loaded for (6) different 7 PRC rifles (22" and 24" tubes), and all of them love the H1000 with 67.5 to 68 grains of powder. Have only loaded 175 grain bullet for each rifle with velocities at 2900 to 2950 fps (using Athlon Radar). All of these rifles shoot 1/2 MOA at 600 yards very consistently. In my experience, the best way to lower ES/SD is by adjusting seating depth. Now that you have some node/charges to follow, I would suggest adjusting seating by .005" and see what that does. ABLR shoot like solids and seem to like a jump, but closer seating depth may lower ES/SD.

Should I be concerned though that the upper end of the ReTumbo charge is nearly 5 grains more than the load you reference? I don’t have pressure signs, but I do know with good brass it may be over pressure and not show it. The last thing I want is to be unsafe. If I didn’t say it above, I am using ADG brass.

 

[prsjohnb]

Dr Mike, would you mind running QuickLoad Data for me on my set up with these powders and any others you think may be worth considering.
22” 7PRC
ADG Brass (80.40 water case capacity)
175 ABLR
50k off lands
Coal: 3.3065

Thank You.

 

[Idaho53]

Should I be concerned though that the upper end of the ReTumbo charge is nearly 5 grains more than the load you reference? I don’t have pressure signs, but I do know with good brass it may be over pressure and not show it. The last thing I want is to be unsafe. If I didn’t say it above, I am using ADG brass.

Here is the load data from Hodgon for Retumbo. I am not a huge fan of running over book on powder charges, but velocity usually will tell more about pressure (in addition to ejector marks, primer flattening/craters, etc.) Please note the 67.5 to 68 grains of powder I use is for H1000 power only.

 

[prsjohnb]

Yeah. That’s what has me worried. I don’t see any signs on the brass and didn’t have any hard bolt lifts, but 3 grains over is a lot. I love that top end speed, but I may need to test the ReTumbo/71.20 load and H1000/68.50 and go from there.

 

[DrMike]

Given the parameters you list:

Cartridge          : 7 mm PRC
Bullet             : .284, 175, Nosler Accubond LR 58517
Useable Case Capaci: 68.500 grain H2O = 4.448 cm³
Cartridge O.A.L. L6: 3.307 inch = 84.00 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon Retumbo

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0  101    64.44   2610    2646   44161  13890     99.0    1.352
-09.0  103    65.16   2643    2714   45807  14010     99.3    1.329
-08.0  104    65.87   2676    2782   47520  14118     99.6    1.306
-07.0  105    66.59   2709    2851   49303  14215     99.8    1.283
-06.0  106    67.30   2742    2921   51169  14300     99.9    1.260
-05.0  107    68.02   2775    2992   53112  14373    100.0    1.238
-04.0  108    68.74   2807    3063   55140  14433    100.0    1.216
-03.0  109    69.45   2840    3134   57255  14486    100.0    1.195  ! Near Maximum !
-02.0  111    70.17   2872    3206   59466  14538    100.0    1.174  ! Near Maximum !
-01.0  112    70.88   2905    3279   61775  14588    100.0    1.153  ! Near Maximum !
+00.0  113    71.60   2937    3352   64188  14637    100.0    1.133  ! Near Maximum !
+01.0  114    72.32   2969    3425   66714  14683    100.0    1.113  !DANGEROUS LOAD-DO NOT USE!
+02.0  115    73.03   3001    3499   69356  14729    100.0    1.094  !DANGEROUS LOAD-DO NOT USE!
+03.0  116    73.75   3033    3574   72122  14772    100.0    1.075  !DANGEROUS LOAD-DO NOT USE!
+04.0  117    74.46   3065    3650   75022  14814    100.0    1.056  !DANGEROUS LOAD-DO NOT USE!
+05.0  118    75.18   3096    3726   78060  14854    100.0    1.037  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    113    71.60   3010    3520   71913  14295    100.0    1.082  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    113    71.60   2846    3146   57187  15019     99.8    1.192  ! Near Maximum !

Cartridge          : 7 mm PRC
Bullet             : .284, 175, Nosler Accubond LR 58517
Useable Case Capaci: 68.500 grain H2O = 4.448 cm³
Cartridge O.A.L. L6: 3.307 inch = 84.00 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon H1000 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   98    61.20   2549    2526   44298  12915     96.0    1.346
-09.0   99    61.88   2582    2590   45919  13067     96.5    1.323
-08.0  100    62.56   2614    2655   47605  13213     97.0    1.300
-07.0  101    63.24   2646    2721   49362  13351     97.5    1.277
-06.0  102    63.92   2679    2788   51192  13482     97.9    1.256
-05.0  103    64.60   2711    2856   53097  13606     98.3    1.234
-04.0  105    65.28   2743    2924   55081  13721     98.6    1.213
-03.0  106    65.96   2776    2994   57159  13829     98.9    1.192  ! Near Maximum !
-02.0  107    66.64   2808    3064   59324  13927     99.2    1.171  ! Near Maximum !
-01.0  108    67.32   2841    3135   61583  14017     99.4    1.151  ! Near Maximum !
+00.0  109    68.00   2873    3207   63943  14098     99.6    1.131  ! Near Maximum !
+01.0  110    68.68   2905    3280   66410  14170     99.8    1.112  !DANGEROUS LOAD-DO NOT USE!
+02.0  111    69.36   2938    3353   68990  14232     99.9    1.093  !DANGEROUS LOAD-DO NOT USE!
+03.0  112    70.04   2970    3428   71687  14284    100.0    1.074  !DANGEROUS LOAD-DO NOT USE!
+04.0  113    70.72   3002    3502   74513  14326    100.0    1.055  !DANGEROUS LOAD-DO NOT USE!
+05.0  114    71.40   3034    3578   77475  14359    100.0    1.037  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    109    68.00   2949    3379   70884  13818    100.0    1.083  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    109    68.00   2782    3006   57513  14130     97.7    1.186  ! Near Maximum !

 

[prsjohnb]

Given the parameters you list:

Cartridge          : 7 mm PRC
Bullet             : .284, 175, Nosler Accubond LR 58517
Useable Case Capaci: 68.500 grain H2O = 4.448 cm³
Cartridge O.A.L. L6: 3.307 inch = 84.00 mm
Barrel Length      : 27.0 inch = 685.8 mm
Powder             : Hodgdon Retumbo

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0  101    64.44   2763    2966   44161  10935     99.9    1.507
-09.0  103    65.16   2795    3037   45807  10991    100.0    1.482
-08.0  104    65.87   2828    3107   47520  11038    100.0    1.457
-07.0  105    66.59   2860    3178   49303  11080    100.0    1.432
-06.0  106    67.30   2892    3250   51169  11121    100.0    1.408
-05.0  107    68.02   2924    3322   53112  11161    100.0    1.384
-04.0  108    68.74   2955    3394   55140  11200    100.0    1.361
-03.0  109    69.45   2987    3466   57255  11238    100.0    1.338  ! Near Maximum !
-02.0  111    70.17   3018    3540   59466  11275    100.0    1.315  ! Near Maximum !
-01.0  112    70.88   3049    3613   61775  11311    100.0    1.293  ! Near Maximum !
+00.0  113    71.60   3080    3687   64188  11345    100.0    1.272  ! Near Maximum !
+01.0  114    72.32   3111    3762   66714  11378    100.0    1.250  !DANGEROUS LOAD-DO NOT USE!
+02.0  115    73.03   3142    3837   69356  11409    100.0    1.229  !DANGEROUS LOAD-DO NOT USE!
+03.0  116    73.75   3173    3913   72122  11440    100.0    1.209  !DANGEROUS LOAD-DO NOT USE!
+04.0  117    74.46   3204    3989   75022  11469    100.0    1.189  !DANGEROUS LOAD-DO NOT USE!
+05.0  118    75.18   3235    4066   78060  11496    100.0    1.169  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    113    71.60   3147    3847   71913  11080    100.0    1.217  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    113    71.60   2997    3491   57187  11670    100.0    1.334  ! Near Maximum !

Cartridge          : 7 mm PRC
Bullet             : .284, 175, Nosler Accubond LR 58517
Useable Case Capaci: 68.500 grain H2O = 4.448 cm³
Cartridge O.A.L. L6: 3.307 inch = 84.00 mm
Barrel Length      : 27.0 inch = 685.8 mm
Powder             : Hodgdon H4831 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   92    56.52   2669    2768   46178   9801     97.3    1.495
-09.0   93    57.15   2697    2827   47707   9900     97.7    1.473
-08.0   94    57.78   2726    2887   49283   9996     98.0    1.451
-07.0   95    58.40   2754    2948   50911  10088     98.3    1.429
-06.0   96    59.03   2783    3009   52594  10176     98.5    1.408
-05.0   97    59.66   2811    3071   54334  10260     98.8    1.387
-04.0   98    60.29   2840    3133   56133  10341     99.0    1.367  ! Near Maximum !
-03.0   99    60.92   2868    3196   57994  10417     99.2    1.347  ! Near Maximum !
-02.0  100    61.54   2896    3259   59918  10488     99.4    1.328  ! Near Maximum !
-01.0  101    62.17   2924    3323   61910  10556     99.6    1.308  ! Near Maximum !
+00.0  102    62.80   2952    3387   63971  10619     99.7    1.290  ! Near Maximum !
+01.0  103    63.43   2981    3452   66104  10678     99.8    1.271  !DANGEROUS LOAD-DO NOT USE!
+02.0  104    64.06   3008    3517   68313  10732     99.9    1.253  !DANGEROUS LOAD-DO NOT USE!
+03.0  105    64.68   3036    3582   70601  10781     99.9    1.235  !DANGEROUS LOAD-DO NOT USE!
+04.0  106    65.31   3064    3648   72972  10825    100.0    1.217  !DANGEROUS LOAD-DO NOT USE!
+05.0  107    65.94   3092    3715   75429  10865    100.0    1.200  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    102    62.80   3014    3529   69844  10435    100.0    1.243  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    102    62.80   2879    3221   58159  10671     98.3    1.342  ! Near Maximum !

How much does barrel length matter bc that shows 27” vs 22” like I have

 

[DrMike]

Cartridge          : 7 mm PRC
Bullet             : .284, 175, Nosler Accubond LR 58517
Useable Case Capaci: 68.500 grain H2O = 4.448 cm³
Cartridge O.A.L. L6: 3.307 inch = 84.00 mm
Barrel Length      : 22.0 inch = 558.8 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 65000 psi, or 448 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

20 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.
Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
ReloadSwiss RS 76 *C               105.8     71.9     4.66    2985   100.0    65000   15317   1.127  ! Near Maximum !
Vihtavuori N570 *C                 109.3     72.8     4.72    2976    97.1    65000   16586   1.132  ! Near Maximum !
ReloadSwiss RS 80 *C               108.3     74.2     4.81    2955    99.0    65000   15904   1.140  ! Near Maximum !
Vihtavuori N568 *C*T               108.8     71.7     4.65    2940    98.7    65000   15695   1.140  ! Near Maximum !
Alliant Reloder-33 *C              110.0     75.4     4.88    2928    96.9    62465   16247   1.154  ! Near Maximum !
Alliant Reloder-26 *C               97.2     66.0     4.27    2916   100.0    65000   14200   1.153  ! Near Maximum !
Norma MRP 2 *C                     108.4     68.4     4.44    2913    99.7    65000   14935   1.148  ! Near Maximum !
Bofors RP30                        108.4     68.4     4.44    2913    99.7    65000   14935   1.148  ! Near Maximum !
PB Clermont PCL 517                103.0     69.4     4.50    2913    99.8    65000   14666   1.132  ! Near Maximum !
SNPE Vectan SP 12                  102.8     69.3     4.49    2912    99.8    65000   14634   1.133  ! Near Maximum !
Vihtavuori N560 *C                 100.2     64.6     4.19    2908    99.3    65000   14938   1.139  ! Near Maximum !
Alliant Reloder-25 *C              106.2     66.7     4.32    2905   100.0    65000   13850   1.137  ! Near Maximum !
Norma MRP *C                        98.3     64.8     4.20    2904   100.0    65000   14388   1.146  ! Near Maximum !
Accurate MAGPRO                    100.4     67.4     4.37    2902    98.4    65000   15096   1.146  ! Near Maximum !
IMR 7828                           104.7     64.2     4.16    2900    99.5    65000   14459   1.129  ! Near Maximum !
IMR 7828 SSC                        99.0     64.2     4.16    2900    99.5    65000   14459   1.129  ! Near Maximum !
ADI AP 2214                        104.0     68.2     4.42    2889    99.7    65000   14171   1.123  ! Near Maximum !
Vihtavuori N565 *C*T               104.8     68.0     4.40    2889    99.4    65000   14777   1.158  ! Near Maximum !
ADI AR 2213                        100.1     63.9     4.14    2888    99.5    65000   14343   1.126  ! Near Maximum !
Hodgdon H1000 *T                   109.3     68.3     4.43    2887    99.7    65000   14130   1.123  ! Near Maximum !
ADI AR 2217                        109.3     68.3     4.43    2887    99.7    65000   14130   1.123  ! Near Maximum !
Bofors RP5/NP ~approximation       100.5     64.1     4.16    2882    99.9    65000   14274   1.145  ! Near Maximum !
Alliant Reloder-22 *C              100.5     64.1     4.16    2882    99.9    65000   14274   1.145  ! Near Maximum !
Raufoss RA15 *C                    100.5     64.1     4.16    2882    99.9    65000   14274   1.145  ! Near Maximum !
Winchester WXR                     103.2     64.4     4.18    2882    99.9    65000   14301   1.145  ! Near Maximum !
Bofors RP15                        103.2     64.4     4.18    2882    99.9    65000   14301   1.145  ! Near Maximum !
ADI AR 2218                        110.0     74.0     4.79    2876    95.6    58535   16458   1.171  ! Near Maximum !
ReloadSwiss RS 70 *C                92.0     61.9     4.01    2873   100.0    65000   13379   1.137  ! Near Maximum !
Ramshot Magnum                     100.2     68.9     4.47    2866   100.0    65000   13628   1.140  ! Near Maximum !
Bofors RP5 NT *C ~approximation    103.9     66.9     4.33    2862    98.2    65000   14266   1.127  ! Near Maximum !
Hodgdon Retumbo                    110.0     69.8     4.53    2858   100.0    58438   14514   1.184  ! Near Maximum !
ADI AR 2225                        110.0     69.8     4.53    2858   100.0    58438   14514   1.184  ! Near Maximum !
Ramshot LRT                        110.0     74.9     4.85    2855    90.5    61283   15563   1.155  ! Near Maximum !
ADI AR 2209                         97.1     61.0     3.95    2846    99.9    65000   13557   1.133  ! Near Maximum !
Alliant Reloder-19 *C               97.6     61.6     3.99    2844    99.9    65000   13627   1.140  ! Near Maximum !
Rottweil R905                       97.8     61.3     3.97    2840    99.9    65000   13497   1.147  ! Near Maximum !
Alliant Reloder-16 *C *T            93.1     57.2     3.71    2839   100.0    65000   12692   1.138  ! Near Maximum !
Bofors RL16 TZ *C *T                93.1     57.2     3.71    2839   100.0    65000   12692   1.138  ! Near Maximum !
Bofors RP14 ~approximation          98.3     62.1     4.02    2838    99.9    65000   13536   1.141  ! Near Maximum !
PB Clermont PCL 518                 93.9     61.2     3.97    2835   100.0    65000   13179   1.147  ! Near Maximum !
Alliant Reloder-23 *C *T           102.0     63.0     4.08    2831   100.0    65000   12684   1.155  ! Near Maximum !
Bofors RP36 ZT *C *T               102.0     63.0     4.08    2831   100.0    65000   12684   1.155  ! Near Maximum !
PB Clermont PCL 511                 90.2     60.7     3.93    2831   100.0    65000   13077   1.148  ! Near Maximum !
Ramshot Hunter                      93.2     60.7     3.94    2830   100.0    65000   13060   1.148  ! Near Maximum !
Vihtavuori N555 *C*T                98.9     61.2     3.97    2828   100.0    65000   12862   1.172  ! Near Maximum !
Hodgdon H4831 *T                   102.8     63.1     4.09    2827    99.0    65000   13565   1.137  ! Near Maximum !
Hodgdon H4831 SC *T                 98.9     63.1     4.09    2827    99.0    65000   13565   1.137  ! Near Maximum !
Raufoss RA4                         95.7     60.4     3.92    2824    99.8    65000   13303   1.140  ! Near Maximum !
Norma 204 *C                        92.7     60.4     3.92    2824    99.8    65000   13303   1.140  ! Near Maximum !
Bofors RP4 ~approximation           95.7     60.4     3.92    2824    99.8    65000   13303   1.140  ! Near Maximum !
ReloadSwiss RS 62                   91.6     60.6     3.93    2824   100.0    65000   12804   1.162  ! Near Maximum !
Vihtavuori 24N41 *C                110.0     74.0     4.79    2814    90.4    61637   14686   1.155  ! Near Maximum !
Somchem S385                        97.7     62.4     4.04    2807   100.0    65000   12971   1.159  ! Near Maximum !
Vihtavuori N550 *C*T                90.1     58.2     3.77    2806   100.0    65000   12651   1.157  ! Near Maximum !
Norma URP *C                        92.7     57.9     3.75    2804   100.0    65000   12498   1.154  ! Near Maximum !
Bofors RP19 ~approximation          92.7     57.9     3.75    2804   100.0    65000   12495   1.154  ! Near Maximum !
Hodgdon LVR                         90.5     57.1     3.70    2804   100.0    65000   12487   1.149  ! Near Maximum !
Winchester Supreme 780              96.3     64.1     4.16    2802    99.8    65000   12979   1.146  ! Near Maximum !
Rottweil R904                       96.7     60.2     3.90    2801    99.4    65000   13050   1.140  ! Near Maximum !
Somchem S365                        94.3     59.2     3.84    2800   100.0    65000   12125   1.163  ! Near Maximum !
Accurate 4350                       91.7     57.9     3.75    2798   100.0    65000   12443   1.172  ! Near Maximum !
Bofors RP4 NT *C ~approximation     93.4     59.9     3.88    2797   100.0    65000   12723   1.152  ! Near Maximum !
IMR 4955 Enduron *C*T              100.3     61.6     3.99    2796    99.1    65000   13148   1.138  ! Near Maximum !
Vihtavuori N165 *C                 102.9     64.3     4.16    2795   100.0    65000   12711   1.150  ! Near Maximum !
Shooters World BMG                 108.9     74.0     4.79    2795    92.1    65000   13801   1.144  ! Near Maximum !
Lovex D100                         108.9     74.0     4.79    2795    92.1    65000   13801   1.144  ! Near Maximum !
Accurate 3100                      100.6     63.5     4.12    2789   100.0    65000   12534   1.175  ! Near Maximum !
Lovex S071                         106.4     63.5     4.12    2789   100.0    65000   12534   1.175  ! Near Maximum !
IMR 4831                            97.2     58.8     3.81    2787   100.0    65000   12234   1.163  ! Near Maximum !
Shooters World SW4350               92.8     57.9     3.75    2782   100.0    65000   12488   1.158  ! Near Maximum !
Lovex S070                          92.8     57.9     3.75    2782   100.0    65000   12488   1.158  ! Near Maximum !

 

[prsjohnb]

So I know the programs are not 100% accurate but on your data, it shows ReTumbo at 110% of fill capacity with 69.80 grains. We were able to load 73 grains in there without it being a heavy compressed load. The pressure it is showing in your program is 58,438. I am guessing that is saying that you will fill the case before you hit full pressure. Again, how are we able to load more and since we can, how do we find out what our actual max load is?