Hondo64d
Well-Known Member
IMR4831 is a slower BURNING powder but that doesn't necessarily mean slower shooting, ie slower velocities. Because of its burn rate, I would expect 41gr IMR4831 to be a fairly low pressure load, and that is what your velocities reflect. I would keep increasing charge weight by .3-.4gr at a time, watching for excess pressure signs and accuracy along the way. With a 22 inch barrel, I would think you should be able to reach 2725 without too much problem.Trying to find a load for the 6.5 cm. So far I have tried the IMR 4831 powder loaded with 41 grains. It shot pretty good in the gun but I recently read that this is a slower shooting powder. The gun(a browning hells canyon with 22in barrel). The velocity is 2620 so I really didn't want to go lower that. I have also tried the h4350 with 40.8 grains and had a decent group but wasn't as good as the IMR 4831. Any load suggestions? Shooting the 143 Eldx bullet. Thanks!
Hodgon's data shows a max of 45gr IMR4831 behind the 143gr ELDX for a MV of 2760, so you should have a bit of performance still available.
John