I was recently at a range trying out some different types of ammo that I had aquried through several sources. I 1st shot IMI M855 it was fantistic, & very accurate. Then I shot some wolf 5.56, & was frankly skeptical after all I have read, but It too shot flawlessly,& again supprisingly accurate. Then I shot , or rather tried to shoot this 5.56mm SC 20StUck brand ammo. Ouch! the name is accurate if nothing ealse. I only shot a couple boxes each of the afor mentioned brands, so it was not because of wolf shit in my chamber, but this stuff stuck about every other shot . I gave up after about 5, or 6 shots with almost as many ftc's. My upper is a DPMS M-4 16" & Ive never had any other chambering trouble with any other ammo. I dont have the tools to spec out this ammo, But I sure would like to get some info on it from a couple of you guru's. I'd even send a box to the 1st & 2nd expert to check who answers this letter "if you want it". Thanks in advance as always. The Searcher