WB
I had no problems with the .416 Rigby or GNR's
Sunday, August 04, 2019, 18:16

I usually shoot slicker cast bullets but jacketed will work fine. Seek the data on Hodgdon's site. Don;t pack it but don't under load it either. The biggest worry is some misfire and sticking a bullet. Very unlikely but be aware. Velocity will be what it will be, a grain here or there won;t make any difference.