Quick load; 7x57; AKA .275 RIGBY PLEASE.

salmonchaser

Handloader
Dec 13, 2013
4,471
3,452
I am just about out of Rl 17. I’ll need to substitute something near the burn rate, I guess.
I have both H 4350 and Stabull 6.5
I’m getting 2970 with a standard deviation of 8 pushing a 140 Ballistic Tip COAL of 3.040
I’m getting Just a touch faster with an AccuBond Also loaded to 3.040
49 grains of Rl 17/ Ruger #1.
Thanks in advance
Oh and I saw these guys in my pasture this morning; No I did not draw a tag for mule deer again.
 

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At 49.0 grains, you're a little over maximum pressure for SAAMI parameters. On the other hand, I understand that the standards were set low for any of the older rifles still in cirulation.

Code:
Cartridge          : 7 x 57 mm Mauser (SAAMI)
Bullet             : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 52.810 grain H2O = 3.429 cm³
Cartridge O.A.L. L6: 3.071 inch = 78.00 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-17 *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   86    44.10   2639    2164   37992   9192     97.8    1.361
-09.0   87    44.59   2668    2213   39224   9284     98.2    1.341
-08.0   88    45.08   2697    2262   40497   9372     98.5    1.321
-07.0   89    45.57   2726    2311   41813   9456     98.8    1.301
-06.0   90    46.06   2756    2360   43175   9534     99.0    1.282
-05.0   91    46.55   2785    2410   44583   9609     99.3    1.263  ! Near Maximum !
-04.0   92    47.04   2813    2461   46040   9678     99.5    1.244  ! Near Maximum !
-03.0   93    47.53   2842    2511   47549   9742     99.6    1.226  ! Near Maximum !
-02.0   94    48.02   2871    2562   49110   9801     99.8    1.208  ! Near Maximum !
-01.0   95    48.51   2900    2614   50726   9856     99.9    1.191  !DANGEROUS LOAD-DO NOT USE!
+00.0   96    49.00   2928    2665   52399   9905     99.9    1.173  !DANGEROUS LOAD-DO NOT USE!
+01.0   97    49.49   2957    2717   54134   9948    100.0    1.157  !DANGEROUS LOAD-DO NOT USE!
+02.0   98    49.98   2985    2769   55931   9987    100.0    1.140  !DANGEROUS LOAD-DO NOT USE!
+03.0   99    50.47   3013    2822   57794  10023    100.0    1.123  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    50.96   3041    2874   59723  10058    100.0    1.107  !DANGEROUS LOAD-DO NOT USE!
+05.0  101    51.45   3069    2927   61719  10093    100.0    1.091  !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     96    49.00   2998    2794   57922   9671    100.0    1.126  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     96    49.00   2842    2511   47270  10016     98.8    1.227  ! Near Maximum !

If I maintain the charge you are using, suggested loadings are as follows:


Code:
Cartridge          : 7 x 57 mm Mauser (SAAMI)
Bullet             : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 52.810 grain H2O = 3.429 cm³
Cartridge O.A.L. L6: 3.071 inch = 78.00 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 51000 psi, or 351 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 !

8 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
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-26 *C              106.3     55.6     3.61    2970    98.8    51000   11096   1.183  ! Near Maximum !
Norma MRP *C                       106.5     54.1     3.51    2925    96.3    51000   10809   1.187  ! Near Maximum !
ReloadSwiss RS 60 *T                96.1     49.0     3.18    2925   100.0    51000    9937   1.182  ! Near Maximum !
Alliant Reloder-17 *T               95.2     48.6     3.15    2904    99.9    51000    9864   1.188  ! Near Maximum !
Elcho 17                            95.2     48.6     3.15    2904    99.9    51000    9864   1.188  ! Near Maximum !
ReloadSwiss RS 70 *C                98.8     51.3     3.32    2900    98.4    51000   10245   1.184  ! Near Maximum !
Vihtavuori N555 *C*T               107.7     51.4     3.33    2897    99.4    51000   10040   1.211  ! Near Maximum !
Vihtavuori N560 *C                 107.8     53.6     3.48    2892    92.0    51000   10640   1.189  ! Near Maximum !
Somchem S365                       102.5     49.6     3.22    2891   100.0    51000    9459   1.197  ! Near Maximum !
Raufoss RA15 *C                    108.3     53.3     3.45    2888    94.6    51000   10447   1.192  ! Near Maximum !
Alliant Reloder-22 *C              108.3     53.3     3.45    2888    94.6    51000   10447   1.192  ! Near Maximum !
Bofors RP5/NP ~approximation       108.3     53.3     3.45    2888    94.6    51000   10447   1.192  ! Near Maximum !
Alliant Reloder-23 *C *T           110.0     52.4     3.39    2886    99.8    50047    9881   1.200  ! Near Maximum !
Bofors RP36 ZT *C *T               110.0     52.4     3.39    2886    99.8    50047    9881   1.200  ! Near Maximum !
Alliant Reloder-16 *C *T            99.6     47.2     3.06    2882    99.2    51000    9758   1.186  ! Near Maximum !
Bofors RL16 TZ *C *T                99.6     47.2     3.06    2882    99.2    51000    9758   1.186  ! Near Maximum !
Accurate MAGPRO                    108.5     56.2     3.64    2880    90.0    51000   10602   1.193  ! Near Maximum !
ReloadSwiss RS 62                   99.0     50.5     3.27    2874    98.7    51000    9863   1.206  ! Near Maximum !
IMR 7828 SSC                       105.9     52.9     3.43    2860    92.2    51000   10255   1.187  ! Near Maximum !
PB Clermont PCL 518                100.6     50.6     3.28    2857    97.1    51000    9876   1.197  ! Near Maximum !
PB Clermont PCL 511                 96.6     50.1     3.24    2857    97.4    51000    9841   1.198  ! Near Maximum !
Ramshot Hunter                      99.8     50.1     3.25    2856    97.4    51000    9826   1.198  ! Near Maximum !
Bofors RP15                        110.0     53.0     3.43    2851    93.9    49125   10324   1.213  ! Near Maximum !
Winchester WXR                     110.0     53.0     3.43    2851    93.9    49125   10324   1.213  ! Near Maximum !
SNPE Vectan SP 12                  110.0     57.2     3.70    2847    92.2    50192   10422   1.196  ! Near Maximum !
Hodgdon H414                        94.0     48.4     3.14    2846    96.5    51000    9758   1.203  ! Near Maximum !
Winchester 760                      94.0     48.4     3.14    2846    96.5    51000    9758   1.203  ! Near Maximum !
Accurate 4350                       99.0     48.2     3.12    2846    98.9    51000    9595   1.223  ! Near Maximum !
Norma URP *C                        99.2     47.8     3.09    2844    98.8    51000    9549   1.207  ! Near Maximum !
Bofors RP19 ~approximation          99.2     47.8     3.10    2844    98.8    51000    9546   1.207  ! Near Maximum !
ADI AR 2213                        106.5     52.4     3.40    2844    92.0    51000   10110   1.188  ! Near Maximum !
Ramshot Magnum                     107.8     57.2     3.70    2843    94.8    51000   10014   1.189  ! Near Maximum !
Rottweil R905                      109.3     52.8     3.42    2841    92.1    51000    9967   1.196  ! Near Maximum !
Vihtavuori N550 *C*T                96.1     47.8     3.10    2840    98.7    51000    9631   1.213  ! Near Maximum !
PB Clermont PCL 517                110.0     57.2     3.70    2840    91.9    49915   10408   1.199  ! Near Maximum !
Alliant Reloder-19 *C              104.1     50.7     3.28    2840    94.5    51000    9859   1.196  ! Near Maximum !
Hodgdon LVR                         96.4     46.9     3.04    2834    98.3    51000    9458   1.203  ! Near Maximum !
Bofors RP14 ~approximation         104.8     51.0     3.31    2833    94.4    51000    9784   1.196  ! Near Maximum !
ADI AR 2209                        103.2     50.0     3.24    2831    94.2    51000    9755   1.191  ! Near Maximum !
IMR 4831                           104.2     48.6     3.15    2829    98.9    51000    9379   1.215  ! Near Maximum !
Hodgdon Hybrid 100V                102.1     48.1     3.12    2820    99.8    51000    8920   1.202  ! Near Maxi

Unicorn Dust (aka RL26) could be your huckleberry.
 
H 4350 produces considerably lower velocities than does a similar charge of RL17.

Code:
Cartridge          : 7 x 57 mm Mauser (SAAMI)
Bullet             : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 52.810 grain H2O = 3.429 cm³
Cartridge O.A.L. L6: 3.071 inch = 78.00 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H4350 *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   93    44.10   2558    2035   39855   8322     92.1    1.352
-09.0   94    44.59   2586    2080   41124   8428     92.6    1.332
-08.0   95    45.08   2614    2125   42434   8533     93.1    1.313
-07.0   96    45.57   2642    2170   43788   8635     93.6    1.294
-06.0   97    46.06   2670    2217   45186   8735     94.0    1.276  ! Near Maximum !
-05.0   98    46.55   2698    2263   46629   8833     94.5    1.257  ! Near Maximum !
-04.0   99    47.04   2726    2310   48123   8929     94.9    1.240  ! Near Maximum !
-03.0  100    47.53   2754    2358   49661   9022     95.3    1.222  ! Near Maximum !
-02.0  101    48.02   2782    2406   51243   9113     95.7    1.205  ! Near Maximum !
-01.0  102    48.51   2810    2455   52873   9201     96.1    1.188  !DANGEROUS LOAD-DO NOT USE!
+00.0  103    49.00   2838    2504   54554   9286     96.5    1.172  !DANGEROUS LOAD-DO NOT USE!
+01.0  104    49.49   2866    2554   56292   9369     96.8    1.155  !DANGEROUS LOAD-DO NOT USE!
+02.0  105    49.98   2894    2604   58089   9449     97.1    1.139  !DANGEROUS LOAD-DO NOT USE!
+03.0  106    50.47   2922    2654   59947   9526     97.5    1.124  !DANGEROUS LOAD-DO NOT USE!
+04.0  107    50.96   2950    2705   61868   9600     97.7    1.108  !DANGEROUS LOAD-DO NOT USE!
+05.0  108    51.45   2978    2756   63855   9671     98.0    1.093  !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    103    49.00   2910    2633   59503   9333     98.5    1.129  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    103    49.00   2756    2361   49621   9135     93.5    1.220  ! Near Maximum !

Stabull 6.5 is similar to H 4350 in terms of velocity produced.

Code:
Cartridge          : 7 x 57 mm Mauser (SAAMI)
Bullet             : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 52.810 grain H2O = 3.429 cm³
Cartridge O.A.L. L6: 3.071 inch = 78.00 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Winchester 6,5 StaBall *T*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   88    46.35   2539    2004   37985   8107     97.9    1.372
-09.0   89    46.87   2566    2048   39232   8187     98.2    1.352
-08.0   90    47.38   2594    2092   40527   8264     98.5    1.332
-07.0   91    47.90   2622    2137   41863   8337     98.8    1.312
-06.0   92    48.41   2649    2182   43250   8407     99.1    1.293
-05.0   93    48.93   2677    2227   44684   8473     99.3    1.273  ! Near Maximum !
-04.0   94    49.44   2704    2273   46172   8534     99.5    1.255  ! Near Maximum !
-03.0   95    49.96   2732    2320   47713   8592     99.6    1.236  ! Near Maximum !
-02.0   96    50.47   2759    2366   49312   8646     99.8    1.218  ! Near Maximum !
-01.0   97    50.99   2786    2413   50970   8695     99.9    1.200  ! Near Maximum !
+00.0   98    51.50   2813    2460   52688   8740     99.9    1.183  !DANGEROUS LOAD-DO NOT USE!
+01.0   99    52.02   2840    2508   54473   8780    100.0    1.166  !DANGEROUS LOAD-DO NOT USE!
+02.0  100    52.53   2867    2556   56324   8816    100.0    1.149  !DANGEROUS LOAD-DO NOT USE!
+03.0  101    53.05   2894    2604   58247   8850    100.0    1.132  !DANGEROUS LOAD-DO NOT USE!
+04.0  102    53.56   2921    2652   60245   8882    100.0    1.116  !DANGEROUS LOAD-DO NOT USE!
+05.0  103    54.08   2948    2701   62320   8913    100.0    1.100  !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     98    51.50   2875    2569   57765   8560    100.0    1.139  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     98    51.50   2738    2331   47889   8822     98.8    1.233  ! Near Maximum !
 
Thank you Dr. Mike. I have a little Rl26, Kind of saving that for the 338 Jarrett. I may be forced down that road however.
 
What about Hunter Don?

Cartridge : 7 x 57 mm Mauser
Bullet : .284, 140, Nosler AccuBond 59992
Useable Case Capaci: 52.251 grain H2O = 3.393 cm³
Cartridge O.A.L. L6: 3.071 inch = 78.00 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Ramshot Hunter

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 82 40.80 2315 1666 28148 7622 87.2 1.550
-18.0 84 41.82 2374 1752 30026 7885 88.6 1.509
-16.0 86 42.84 2433 1841 32035 8141 89.9 1.469
-14.0 88 43.86 2493 1932 34182 8389 91.2 1.430
-12.0 90 44.88 2553 2025 36481 8629 92.3 1.392
-10.0 92 45.90 2612 2121 38942 8860 93.5 1.351
-08.0 94 46.92 2672 2220 41581 9080 94.5 1.310
-06.0 96 47.94 2732 2321 44410 9289 95.5 1.271
-04.0 98 48.96 2792 2424 47449 9485 96.3 1.233
-02.0 100 49.98 2852 2529 50714 9668 97.1 1.197 ! Near Maximum !
+00.0 103 51.00 2912 2637 54225 9836 97.8 1.161 ! Near Maximum !
+02.0 105 52.02 2972 2746 58009 9989 98.4 1.127 !DANGEROUS LOAD-DO NOT USE!
+04.0 107 53.04 3032 2858 62091 10125 98.9 1.094 !DANGEROUS LOAD-DO NOT USE!
+06.0 109 54.06 3092 2971 66498 10245 99.3 1.062 !DANGEROUS LOAD-DO NOT USE!
+08.0 111 55.08 3151 3087 71267 10346 99.6 1.031 !DANGEROUS LOAD-DO NOT USE!
+10.0 113 56.10 3210 3204 76434 10428 99.9 1.001 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 103 51.00 3058 2906 65808 9664 100.0 1.074 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 103 51.00 2718 2296 43997 9456 91.1 1.274
 
I have not tried Hunter but the numbers look good. I’m trying not to take on too many new to me powders, hoping something happens and we start seeing Rl 26; and 17 again. I need to stop the load development process and just position shoot, hunting season is five weeks out, Antelope in Wyoming.
Made it out yesterday with some of the loads from Dr. Mikes printouts for the 275 Rigby, rapidly becoming my favorite rifle.
Rl 16, gave decent accuracy;
48. Rl 16
140 BT. @ 3.045
2840 fps SD 10/five rounds measured.
Accuracy is essentially the same as the Rl 17 but a 100 fps slower.
Rl 26 was Very good.
50.6 showed as max load however I could only get 55.0 grains in the case. Could have just filled the case to the rim with out weighing, they were that full!
definitely a compressed load:)
140 BT.
3.045 coal
2921 with an SD 9.0
with the number 1 I generally stick with three shot groups. It’s just not a bench rest rifle and any little mistake in technique is amplified.
I checked after three shots and the other guys at the range said I started making funny noises. I pulled number four and called it without looking. I’ll take the three shot group any day.
 

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Last edited:
Looking good! Yeah, I can see how one would enjoy the Rigby. Just the historical significance would make the rifle feel good in your hands.
 
Looking good Don. That rifle will be great for WY Antelope.

JD338
 
I have not tried Hunter but the numbers look good. I’m trying not to take on too many new to me powders, hoping something happens and we start seeing Rl 26; and 17 again. I need to stop the load development process and just position shoot, hunting season is five weeks out, Antelope in Wyoming.
Made it out yesterday with some of the loads from Dr. Mikes printouts for the 275 Rigby, rapidly becoming my favorite rifle.
Rl 16, gave decent accuracy;
48. Rl 16
140 BT. @ 2.045
2840 fps SD 10/five rounds measured.
Accuracy is essentially the same as the Rl 17 but a 100 fps slower.
Rl 26 was Very good.
50.6 showed as max load however I could only get 50.0 grains in the case. Could have just filled the case to the rim with out weighing, they were that full!
definitely a compressed load:)
140 BT.
2.045 coal
2921 with an SD 9.0
with the number 1 I generally stick with three shot groups. It’s just not a bench rest rifle and any little mistake in technique is amplified.
I checked after three shots and the other guys at the range said I started making funny noises. I pulled number four and called it without looking. I’ll take the three shot group any day.
I hope RL17 and 26 begin showing up myself. I have started using Hunter a bit more and it's seeminly just a tick slower in FPS than 17 so it's in a good spot.

That rifle is shooting though. Even the 140 at 2840 ain't exactly a slow poke. Seems like you have some options.
 
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