I'm loading for the 6.5 Grendel using Alexander Arms(Lapua) brass. The flash hole on this brass is small, really small. I'm also trying to work up a load with AA 2520, a very fine ball powder with 120gr bullets.
With standard 7 1/2 primers my velocities are all over the place. When I get really bad ES like this I usually switch to a Mag primer and work my loads up again. Sometimes it works and sometimes it doesn't. My problem is, nobody around here has ant SR Mag primers.
Then I thought about the small flash hole. What do you think will happen if I open up the flash hole to normal? Do you think this will help reduce my ES with non mag primers or will it just ruin my 6.5 Grendel brass?
Thanks
Steve
With standard 7 1/2 primers my velocities are all over the place. When I get really bad ES like this I usually switch to a Mag primer and work my loads up again. Sometimes it works and sometimes it doesn't. My problem is, nobody around here has ant SR Mag primers.
Then I thought about the small flash hole. What do you think will happen if I open up the flash hole to normal? Do you think this will help reduce my ES with non mag primers or will it just ruin my 6.5 Grendel brass?
Thanks
Steve