Tried the 7mm-08AI route back in 2007 NoMercy.. With 139-140gr bullets I saw around 50-100fps on average velocity increase. Needless to say, wasn't worth the effort of resizing and fireforming. Pretty sure it was one of my Hart barrels that I had Bill ream an AI chamber for. RR loves AI conversions. I myself just don't see enough improvement in MOST cartridges to find it worth the effort.