Originally Posted by elkaholic
Lefty......I have seen that happen only velocity usually is the way to go to make a stiff bullet obturate (more pressure). I know Bill Stieger (sp)? Bitterroot Bullets, use to say to load up his thick jacket bullets and they would obturate better. It seems more like velocity "causes" the problem in this case??.......Rich
Not nessesarily. If the bore is out of whack enough that it'll never engrave properly, the only choice for any real accuracy is to drop the pressure as the bullet exits by using a faster powder or dropping your charge back quite a bit.
I remember one 243 load my pops was killing 'yotes with that would pop off at just north of 2,000 fps; the load was in the sub 1/2 moa range for 5 and he'd regularly knock off coyotes with the rifle when we were out bird hunting at pretty stiff ranges. Years later we tried to crank up those bullets in the same rifle and they would spray no matter the powder we used. The cream puff load was letting the bullet loose easier.
I'd bet if the op went to say 4064 or 4320 instead of 4831 his groups would come in as the pressure would be off more at bullet exit. He'd have to deal with lower load density, but it'll shoot better.