I had accumulated 450 rounds of it before the first ammo Obamalypse back when one of my stops used to put it on the counters for $26.99 for 50 and no one really knew what it was. I had a 2nd Gen 21 then and never had any issues with feeding through it using the HST +P. Every test I've ever seen always looks good but I've never had to use it for anything more than the range. As some have stated already, it's a real "popper." Wanna kill these ads? We can help!