I have some of the magnum primers.They seem to work ok with single base powder,like 4350,but I get hang fires with Reloader-22 in my 300 Win mag.So they seem to be a little cold.
~Molɔ̀ːn Labé Skýla~ As Bob Hagel would say"You should not use a rifle that will kill an animal when everything goes right; you should use one that will do the job when everything goes wrong."Good words of wisdom...............
