Magnum primers, yes or no?

[Mitdr774]

Just to clarify, guys, this will be in a bolt Grendel, a Howa Mini to be exact. So no concerns with slam fires, just looking for what's going to give me the best loads for targets, hoping to reach out to 1000 yards someday. Thanks again.

Dave

I have had the best results with 450 and GM205M primers in my Howa. It depends some on the powder being used as to which primer I seem to have better results with. CCI 400 were okay, and WSR primers seem to be very soft and liked to flatten out on any load I tried. They also gave me some of the worst consistency with velocity for just about all loads tried.