Standard cartridge center-feed mags. :)

Good information Squidman. Thanks.

My light-weight rifle idea is the 284 necked to .277, a S/A 270 Winchester. Pac-Nor chambers it. 6.8 bullets and bulky powder for low recoil blacktail hunting and 270 bullets for bigger critters. The 284 case is a touch long but the mags allowing a 2.9" OAL solves that.