I have a few AI chamberings and they always shoot just fine with factory ammo. Matter of fact my 22-250 Ai is very good with factory 22-250 shells. I can't really comment on the centerfeed question cause mine is on a short action stagger feed. I would guess that feeding will work if your donor gun is a short action. I tried a 6MM AI from a 30-06 centerfeed magazine with zero luck at all.
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