Any thoughts on R-26 in heavy than average - for me anyway- caliber bullets in a 22" M70 7x57, or mebbe a 7mm-08 in 150gr & 160-62gr er's?, Both are a new to me calibers I'm just getting started in and planned to replace my 260 with the 7-08 and pair it up with the 7x57 I just got couple weeks ago . Gonna try it for sure in a M70 24" 270 in 150's...if I can find any down here in East Texas.
Ron
This is what QL shows for it. I have been seeing RL26 using a little less charge weight to attain the predicted speed in a few cartridges, but it looks fairly possible. 2800 with a 160 would be A-OK..
Cartridge : 7 x 57 mm Mauser (SAAMI)
Bullet : .284, 160, Nosler PART SP 16327
Useable Case Capaci: 52.348 grain H2O = 3.399 cm³
Cartridge O.A.L. L6: 3.071 inch = 78.00 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Alliant Reloder-26
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.909% 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
-09.1 96 50.00 2534 2282 40332 11469 97.1 1.336
-08.2 97 50.50 2564 2336 41716 11581 97.5 1.314
-07.3 98 51.00 2594 2391 43153 11687 97.9 1.293
-06.4 99 51.50 2625 2447 44648 11786 98.3 1.273
-05.5 100 52.00 2655 2504 46203 11879 98.6 1.252
-04.5 101 52.50 2685 2561 47824 11965 98.9 1.232
-03.6 102 53.00 2715 2618 49508 12044 99.2 1.212
-02.7 103 53.50 2745 2677 51267 12116 99.4 1.193 ! Near Maximum !
-01.8 104 54.00 2775 2735 53099 12180 99.6 1.173 ! Near Maximum !
-00.9 105 54.50 2805 2795 55009 12237 99.8 1.154 ! Near Maximum !
+00.0 106 55.00 2835 2855 57001 12286 99.9 1.136 ! Near Maximum !
+00.9 107 55.50 2864 2915 59080 12327 100.0 1.117 ! Near Maximum !
+01.8 108 56.00 2894 2976 61251 12360 100.0 1.099 !DANGEROUS LOAD-DO NOT USE!
+02.7 109 56.50 2924 3037 63521 12386 100.0 1.081 !DANGEROUS LOAD-DO NOT USE!
+03.6 110 57.00 2954 3099 65893 12409 100.0 1.064 !DANGEROUS LOAD-DO NOT USE!
+04.5 111 57.50 2983 3162 68374 12431 100.0 1.047 !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 106 55.00 2985 3166 72592 11660 100.0 1.034 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 55.00 2609 2417 44590 12188 94.3 1.269
