.358X.404 IMP 200gr. rnsp. 71gr. 4064 Bell brass, one group WLR Primers One group Win. Mag. primers. The avg. Velocity for both groups was right at 2525ft./sec. The group useing the WLR Primers had a very slight hange fire on most. Accuracy was good on both. I wanted to get good prof that on these big cases you really do need a Mag. primer. Yes I reinvented the wheel. roger