Travis from Magpul was able to consistently induce failures to feed by mono-podding the gun on its magazine (a PMAG) when firing from the prone.
Interesting, did he try other mags or just the one? What kind of failures was he getting? I shot Steve's a little, not enough to get a firm opinion, but enough to intrigue me - I really like how it shouldered for me. I want to run one a little harder and get a better opinion on them. I would hesitate on price and lack of spare parts as well for right now. That TR-24 is the cat's a** though.