I just picked up a .308 Axis donor rifle for $200. Match Grade Machine says they’ve got some pre-fit barrels that I think I may go with. I’m thinking of swapping out a Boyd’s stock as well. My question is, what do I need to do to the magazine to get the .450 to reliably feed out of it? I believe the mag that comes with it is a stagger feed for the .308. Can you guys share some picts of your mods? Any tips? Thanks!