Fireforming is the only down side to the 6mmAI, wonderful cartridge & probably one of the easiest to reload for in my arsenal. I made the mistake of putting on a slow twist barrel (1-12) so I cannot comment on the heavies, I can say that the 90's & less often shoot the bugholes Sendero_Man has shown. The one mod I had to do to was modify the feed lips of the mag, it was originally chambered in 243, then 243AI then 6mmAI (Savage 110), I had to adjust the feed lips to feed properly, there was a "pinch point" near the case shoulder that was starting to become a pain as it would allow a round to jump out of the mag every once in a while, I pulled the mag while I was bedding the new stock & made some minor adjustments with hand tools, basically just taking the taper out of the mag, works just fine now all for 10mins of work.
As stated in the Sierra 5th edition "....out of all of ackley's designs, this is one of the better ones..."
You won't be sorry.