Reply With QuoteSome barrels are faster some are slower. I like to use a ladder to see what the OCW is in a new rifle because it saves the amount of ammo you shoot, and gives you a good place to start development.
I am new to reloading, about a year now. Trying to work up a load for my Mod. 12 6mm Norma BR. I am using Lupua brass,
Varget powder, 107 Gr SMK , and Fed. SR match primers.
I tried several loads starting at 27.5 grains up to 30.0 in 0.5 steps. My best group at 100 yds was 0.353 in. that was with 27.5 grains of Varget at a velocity of 2615. My question is, Is this velocity ok? Everything I read shows velocities at 2800 or faster. I would like to shoot this rifle in the F class open division at 300 yds.
Some barrels are faster some are slower. I like to use a ladder to see what the OCW is in a new rifle because it saves the amount of ammo you shoot, and gives you a good place to start development.
My available data is showing the 107 SMK and Varget having a start/max of 26.0/29.0 grains and the 29.0gr load with a velocity of 2620fps. Take that for what its worth, but I'd just try it at 300yds and see what your 27.5 load does. If its consistant then I don't know that I wouldn't worry about being slower than you think it should be. JMHO. Good luck.
204, 22 K-Hornet, 222, 223, 22-250, 22-250AI, 6BR, 243, 243AI, 6-06, 6-WSM, 250-3000AI, 270, 7-08, 7RM, 30BR, 308, 30-06, 375 H&H, 444 Marlin, 450BM, 458WM
I'll try a ladder from 26 to 29 at 300 yds and see if 27,5 still gives good data. Thanks
Last edited by Tuns; 05-23-2013 at 10:38 PM.
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