MagnumManiac
Well-Known Member
I use magnum primers in non magnum cartridges and standard primers in magnum cartridges all the time.Has or does anyone load Win Mag with large rifle primer
or is it a must for LR magnum?
I have never experienced the "use a magnum primer with loads above 60g BS", I use WLR with 114g of H50BMG powder in my 338-416 Rigby Improved without a single hiccup.
The only time a magnum primer is needed is when running reduced loads with lots of airspace, it helps pressurise the case, as Roy Weatherby discovered when he was reducing loads in his 378 based cases he was experimenting with using reduced loads and asked Federal to come with a primer that would stop the hang fires and dented case shoulders.
Cheers.