I just got done building two 1903 Springfields in 260 Rem (not AI) with a .120 total freebore. These aren't AI so I don't know about feeding issues but my 22-250AI has NO such issues and my long 260 has NO issues. I just got done doing barrel break in with cheap Rem core lok 140gr and am starting ladders with 123 Amax loaded COAL 2.862". Hoping to get close to 3100fps.