To decrease the different amoun ts of ammo I have to keep on hand and for ease of reloading, I am planning on going all 30 cal.
I already have a 300 blk, a 308 in a Mauser, a 111 staggerfeed in 30-06 and would like to add the 300WM to round out the stable.

I can use the 220 SMKs (subsonic) and the 147's (supers) from the 300 BLK in both the '06 and the 300WM. I could even throw in a 308 win barrel, add a 180 grnr's, use them in all 4 rifles as well. I could keep just 6 different bullets on hand (3 for hunting and 3 for paper) in 3 weights and have just about the whole enchalada.

Here's the only sticking point. If I want to switch back and forth with the 300WM then my box mag will have to be changed (along with the bolt head and follower of course)

So how can I bed this "wunderrifle" for max accuracy with two different mag boxes?