So I've been trying to get a 200gr partition load worked out with my 300 win mag in a model 70 westerner. To the lands I am .1715 longer than my magazine will allow, which really sucks for tuning. I am already at a compressed load with 200gr portions at magazine length. I am considering changing bullets to a 190gr accubonds but they are longer yet and not sure I have enough case capacity to make this work. Anyway I can change the magazine to get a longer OAL?