Alright fellas , in the next few weeks I will be developing a load for my 300 ultra mag using retumbo / 212 eld-x. Started with loads at 88 , 89 , and 90 grains and will go from there. Hornady says o.a.l of 3.9 but this is not a custom built rifle it is a browning a bolt 2 and I want to be able...