I myself load with magnum primers After i decide to hunt in zero to sub-zero weather. They supply far more responsible ignition beneath These problems and, with standard LR primers, I've experienced misfires beneath People conditions when searching (on the worse possible time, by the way) We tested loads at https://z-ndh-tchen-large-rifle29134.thenerdsblog.com/37236235/federal-large-rifle-an-overview