need help from QL for a 7saum

R

Rcb7saum

Beginner
Aug 2, 2024
11
12
I’m new to this forum. this is my first post.
I just purchased 8# of N560 and cannot find any load data for my short action 7saum on the vihtavouri website and was wondering if anyone with QL could help me out. i want to use the following
norma brass
160 accubonds
FGMM 210 lr primers
my gun has in the past done well at 80k jump using H1000 powder but i could only get good accuracy at 2890 and i hope i can get more speed with the N560. im also very compressed at 64 gr with the H1000 which i don’t like. thanks
 
You are going to be very compressed with N560 when you approach 3K fps.

Code: 
Cartridge          : 7 mm Rem SA Ultra Mag
Bullet             : .284, 160, Nosler AccuBond 54932
Useable Case Capaci: 62.955 grain H2O = 4.088 cm³
Cartridge O.A.L. L6: 2.820 inch = 71.63 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Vihtavuori N568 *C*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  103    62.28   2711    2611   42929  11807     92.1    1.390
-09.0  104    62.97   2748    2682   44626  11970     92.8    1.364
-08.0  105    63.66   2785    2755   46401  12128     93.4    1.339
-07.0  106    64.36   2822    2830   48260  12280     94.1    1.315
-06.0  107    65.05   2860    2905   50205  12425     94.7    1.291
-05.0  109    65.74   2897    2982   52246  12565     95.3    1.267
-04.0  110    66.43   2935    3060   54385  12697     95.9    1.244
-03.0  111    67.12   2973    3139   56628  12823     96.4    1.221  ! Near Maximum !
-02.0  112    67.82   3011    3220   58985  12941     96.9    1.198  ! Near Maximum !
-01.0  113    68.51   3048    3302   61461  13051     97.4    1.176  ! Near Maximum !
+00.0  114    69.20   3087    3385   64063  13153     97.8    1.154  ! Near Maximum !
+01.0  115    69.89   3125    3469   66801  13247     98.2    1.133  !DANGEROUS LOAD-DO NOT USE!
+02.0  117    70.58   3163    3554   69685  13332     98.5    1.111  !DANGEROUS LOAD-DO NOT USE!
+03.0  118    71.28   3201    3640   72720  13408     98.8    1.091  !DANGEROUS LOAD-DO NOT USE!
+04.0  119    71.97   3239    3728   75925  13475     99.1    1.070  !DANGEROUS LOAD-DO NOT USE!
+05.0  120    72.66   3278    3817   79306  13532     99.4    1.050  !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    114    69.20   3186    3606   72234  13087     99.6    1.099  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    114    69.20   2970    3135   56750  12981     94.5    1.216  ! Near Maximum !

Any of a number of other propellants would be more suited to the criteria you have set for youself.

Code: 
artridge          : 7 mm Rem SA Ultra Mag
Bullet             : .284, 160, Nosler AccuBond 54932
Useable Case Capaci: 62.955 grain H2O = 4.088 cm³
Cartridge O.A.L. L6: 2.820 inch = 71.63 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 64000 psi, or 441 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 !

10 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               110.0     68.7     4.45    3101   100.0    61862   12952   1.160  ! Near Maximum !
Alliant Reloder-26 *C              102.5     63.9     4.14    3083   100.0    64000   12058   1.164  ! Near Maximum !
Norma MRP *C                       103.4     62.6     4.06    3060   100.0    64000   12222   1.163  ! Near Maximum !
Vihtavuori N560 *C                 105.1     62.3     4.04    3055    98.6    64000   12570   1.158  ! Near Maximum !
PB Clermont PCL 517                107.8     66.8     4.33    3053    99.2    64000   12322   1.149  ! Near Maximum !
SNPE Vectan SP 12                  107.6     66.7     4.32    3052    99.3    64000   12300   1.150  ! Near Maximum !
Accurate MAGPRO                    105.4     65.0     4.21    3045    97.5    64000   12646   1.165  ! Near Maximum !
IMR 7828                           109.6     61.8     4.01    3039    98.9    64000   12143   1.150  ! Near Maximum !
IMR 7828 SSC                       103.7     61.8     4.01    3039    98.9    64000   12143   1.150  ! Near Maximum !
Vihtavuori N565 *C*T               110.0     65.6     4.25    3034    98.7    63918   12430   1.177  ! Near Maximum !
Bofors RP5/NP ~approximation       105.4     61.8     4.01    3030    99.6    64000   12067   1.165  ! Near Maximum !
Alliant Reloder-22 *C              105.4     61.8     4.01    3030    99.6    64000   12067   1.165  ! Near Maximum !
Raufoss RA15 *C                    105.4     61.8     4.01    3030    99.6    64000   12067   1.165  ! Near Maximum !
ReloadSwiss RS 70 *C                96.7     59.8     3.87    3029   100.0    64000   11345   1.155  ! Near Maximum !
Winchester WXR                     108.2     62.1     4.03    3029    99.5    64000   12085   1.165  ! Near Maximum !
Bofors RP15                        108.2     62.1     4.03    3029    99.5    64000   12085   1.165  ! Near Maximum !
ADI AR 2213                        104.7     61.4     3.98    3024    98.8    64000   12040   1.149  ! Near Maximum !
Alliant Reloder-25 *C              110.0     63.5     4.11    3018   100.0    60833   11679   1.179  ! Near Maximum !
ReloadSwiss RS 60 *T                93.8     57.1     3.70    3017   100.0    64000   10837   1.158  ! Near Maximum !
ADI AP 2214                        108.5     65.3     4.23    3015    99.0    64000   11860   1.147  ! Near Maximum !
Ramshot Magnum                     105.0     66.4     4.30    3009    99.9    64000   11495   1.157  ! Near Maximum !
Alliant Reloder-16 *C *T            97.8     55.3     3.58    2993   100.0    64000   10751   1.158  ! Near Maximum !
Bofors RL16 TZ *C *T                97.8     55.3     3.58    2993   100.0    64000   10751   1.158  ! Near Maximum !
Elcho 17                            92.7     56.4     3.66    2993   100.0    64000   10759   1.167  ! Near Maximum !
Alliant Reloder-17 *T               92.7     56.4     3.66    2993   100.0    64000   10759   1.167  ! Near Maximum !
Bofors RP36 ZT *C *T               107.3     60.9     3.95    2991   100.0    64000   10751   1.171  ! Near Maximum !
Alliant Reloder-23 *C *T           107.3     60.9     3.95    2991   100.0    64000   10751   1.171  ! Near Maximum !
Bofors RP5 NT *C ~approximation    108.3     64.1     4.15    2988    97.1    64000   11890   1.153  ! Near Maximum !
ADI AR 2209                        101.5     58.6     3.80    2986    99.5    64000   11428   1.156  ! Near Maximum !
Vihtavuori N555 *C*T               104.1     59.2     3.84    2984   100.0    64000   10904   1.191  ! Near Maximum !
Alliant Reloder-19 *C              102.1     59.3     3.84    2984    99.5    64000   11496   1.164  ! Near Maximum !
Rottweil R905                      102.4     59.0     3.82    2981    99.6    64000   11383   1.170  ! Near Maximum !
PB Clermont PCL 518                 98.4     58.9     3.82    2980   100.0    64000   11175   1.170  ! Near Maximum !
PB Clermont PCL 511                 94.5     58.4     3.78    2977   100.0    64000   11087   1.171  ! Near Maximum !
Bofors RP14 ~approximation         102.8     59.7     3.87    2977    99.5    64000   11414   1.165  ! Near Maximum !
Ramshot Hunter                      97.6     58.5     3.79    2976   100.0    64000   11072   1.171  ! Near Maximum !
ReloadSwiss RS 62                   96.2     58.5     3.79    2975   100.0    64000   10847   1.183  ! Near Maximum !
Winchester 760                      92.2     56.6     3.67    2974   100.0    64000   11122   1.172  ! Near Maximum !
Hodgdon H414                        92.2     56.6     3.67    2974   100.0    64000   11122   1.172  ! Near Maximum !
 
Rcb7saum said:
Dr Mike, thank you for the reply but I think you ran N568 on the program. I need N560
Click to expand...
Well, that's what happens when I don't wear my glasses.🥴

Code: 
Cartridge          : 7 mm Rem SA Ultra Mag
Bullet             : .284, 160, Nosler AccuBond 54932
Useable Case Capaci: 62.955 grain H2O = 4.088 cm³
Cartridge O.A.L. L6: 2.820 inch = 71.63 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Vihtavuori N560 *C

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   95    56.34   2742    2672   45635  11455     94.7    1.352
-09.0   96    56.97   2775    2736   47250  11592     95.2    1.330
-08.0   97    57.59   2807    2800   48927  11725     95.7    1.309
-07.0   98    58.22   2840    2866   50665  11853     96.2    1.288
-06.0   99    58.84   2873    2932   52477  11976     96.6    1.267
-05.0  100    59.47   2905    2998   54356  12095     97.0    1.247
-04.0  101    60.10   2938    3066   56308  12208     97.4    1.227  ! Near Maximum !
-03.0  102    60.72   2970    3134   58340  12316     97.8    1.207  ! Near Maximum !
-02.0  103    61.35   3003    3203   60450  12418     98.1    1.188  ! Near Maximum !
-01.0  105    61.97   3035    3273   62647  12515     98.4    1.169  ! Near Maximum !
+00.0  106    62.60   3068    3343   64933  12606     98.7    1.151  ! Near Maximum !
+01.0  107    63.23   3100    3414   67311  12691     99.0    1.133  !DANGEROUS LOAD-DO NOT USE!
+02.0  108    63.85   3132    3486   69775  12770     99.2    1.115  !DANGEROUS LOAD-DO NOT USE!
+03.0  109    64.48   3165    3558   72331  12843     99.4    1.097  !DANGEROUS LOAD-DO NOT USE!
+04.0  110    65.10   3197    3631   74988  12909     99.6    1.080  !DANGEROUS LOAD-DO NOT USE!
+05.0  111    65.73   3229    3705   77753  12968     99.7    1.063  !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    106    62.60   3149    3522   72015  12488     99.9    1.103  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    106    62.60   2972    3139   58131  12536     96.3    1.206  ! Near Maximum !
 
Biased off the prediction above, I would think 61.0-62.0 grs with a drop tube should get you where you want to be with a slight crunch.

JD338
 
thanks dr mike and jd338. i loaded two each of 59.4-61.2 with .3 increments using a drop tube, no crunch. all the shots except the first would have been <1” group total at 100 yards and 85 degrees
60.9 & 61.2 all 4 bullets touched . since i’m wanting higher velocity im going to test 60.9, 61.2, and 61.5 at 300 when i can get a calm day and will probably load 5 of each for more reliable data . hopefully, i want have verticle and all
i’ll left to do is send my brass to be annealed and then load up my hunting rounds.
thanks again for the help
 
Sounds like you are closing in on a good load.
Keep us posted with your results.

JD338
 
having 7saum myself i think 160-168 is the sweet spot for that cartridge. 175's are a 2nd, but sierra 183's are great! having 560 and 565 it'll go fast as both are a good fit for the 7saum and 6.5prc.
 
TexasLife said:
having 7saum myself i think 160-168 is the sweet spot for that cartridge. 175's are a 2nd, but sierra 183's are great! having 560 and 565 it'll go fast as both are a good fit for the 7saum and 6.5prc.
Click to expand...
Are you referring to Vihtavuori N560 and N565?

JD338
 
TexasLife said:
having 7saum myself i think 160-168 is the sweet spot for that cartridge. 175's are a 2nd, but sierra 183's are great! having 560 and 565 it'll go fast as both are a good fit for the 7saum and 6.5prc.
Click to expand...
I have another question. i’m think about switching from norma to adg brass. my norma has about 6 firings but i do anneal about every other firing. I’m told adg holds less powder but i’d like to know from those who have switched to it are you able to get the same velocity in the adg which holds less powder. I just found a great wide node with 160 accubonds at 2970 with 61gr of n560 with no crunch using a drop tube and so now i’m concerned if i switch to adg i can’t duplicate that without severely compressed charges. unfortunately, i have a short action
 
I only have adg brass in 7saum, so no help there. In 6.5prc I gave Norma, but thank help either.
 
Rcb7saum said:
thanks dr mike and jd338. i loaded two each of 59.4-61.2 with .3 increments using a drop tube, no crunch. all the shots except the first would have been <1” group total at 100 yards and 85 degrees
60.9 & 61.2 all 4 bullets touched . since i’m wanting higher velocity im going to test 60.9, 61.2, and 61.5 at 300 when i can get a calm day and will probably load 5 of each for more reliable data . hopefully, i want have verticle and all
i’ll left to do is send my brass to be annealed and then load up my hunting rounds.
thanks again for the help
Click to expand...
Rcb7saum said:
I have another question. i’m think about switching from norma to adg brass. my norma has about 6 firings but i do anneal about every other firing. I’m told adg holds less powder but i’d like to know from those who have switched to it are you able to get the same velocity in the adg which holds less powder. I just found a great wide node with 160 accubonds at 2970 with 61gr of n560 with no crunch using a drop tube and so now i’m concerned if i switch to adg i can’t duplicate that without severely compressed charges. unfortunately, i have a short action
Click to expand...
JD338 said:
Sounds like you are closing in on a good load.
Keep us posted with your results.

JD338
Click to expand...
60.9 and 61.2 at 80k jump all went into the same group that had 4 touching last trip. shot the same target so now i have 10 shots in .5 and i saved 2 of each to check velocity. 2966 and 2974. shot the other 2 at 200 and were same height on target so im going to use 61.0 and do one more jump test at 70 k jump and 90k jump at 500.
 
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