That's what I was getting at. You will undoubtedly be fine, because I'm the one that gets all the lemons. I just replaced a damaged-before-it-left-the-factory (not even from shipping) ram on the uber-expensive, supposed-to-be-perfect Zero press last night. Again, just like AINA, Area 419 was on it like white on rice and all is well now. My point was just that it is tempting to buy a spare bolt body and throw it in the safe until you really need it, thinking you have the situation covered. It's a bad thing to find out months/years later that it won't work. You are smart to run it now, verify it, and THEN put it in reserve.
I have two AXMCs, and one AXSR. As delivered, all three rifles were perfect. But I ran into trouble TWICE when purchasing the full complement of bolt bodies to cover all the available chamberings. Both AXMCs came with 338 bolts. Both ran great (one 338NM, one 338LM). I bought a 308 bolt body to run 6.5CM. When I attempted to insert the firing pin assembly from one of the rifles, it would go it, but I couldn't rotate it to lock it in. It turned out that the bolt was incompletely machined, and lacked the internal channel that allows the lug on the firing pin assembly to rotate and lock in to. I sent it back and they replaced it immediately. The AXSR was delivered as a 300 PRC, and was perfect. When they became available, I bought a 308 and 338 bolt body for it. The 308 was fine, but the 338 bolt was extremely stiff to close. It was simply not in-spec, and they replaced it immediately. Bottom line - no matter how great a manufacturer’s reputation (and AI’s is deservedly excellent), Reagan’s philosophy rings true: Trust, but verify.
www.nya-evo.com
…although I did break two AXSR 308 mag baseplates within the first two months of matches 
