Quote:
Originally Posted by Brush Okie
Thanks. I have a very high quality bolt action and a M1A aka M-14. I would like to develop loads for both. What is max range on subsonics before drop off gets to bad in your opinion? BTW the twist on the rifles are 1:10 and 1:11. Will the 180 or 190 stabilize at those velocities with those twists or will I have to drop my bullet weight? Also did you use regular or magnum primers?
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My barrels all 1:11.25 and I went with the 180s. It was just more accurate. With the 1:10, you should be able to go to the 190s. I'd try both and if they're not keyholing, then you will be good with a suppressor.
I did not use magnum primers, Win Large Rifle.
As far as max range, you can get pretty far out, but it becomes a "howitzer" shot. I don't have my notes in front of me but the velocity loss was less than you'd think. I was fine hitting plates @ 300m but if the winds were blowing, it took a lot of guess work (the round was often very high above the ground). I've witnessed guys shoot out to 900m with 338 subsonics.