Bought 1000 rds ammo to support a nice handgunning weekend and was really looking forward to shooting it. Came in 10 packs of 100 rds each inside a box. But sadly Locked up my cylinder almost every time. Tried it again on another revolver this weekend while opening a different bag hoping for a better result, this was when shooting with a friend at his house, this locked up this other revolver as well. ... cylinder would not turn once again after shot 1. - That Saturday evening I then hand selected out the most questionable looking rounds (pressure lines in brass, dents in brass) . This removed about 20% of rounds of the next 2 bags. Again next morning I was still unable to shoot a single 6 shot drum... revolver locked up halfway thru the trigger pull. an expanded case was clearly obstructing the turn of the cylinder. Likely IMO cause , using too many times reloaded brass. Company owner says its "the guns fault" says GP100s are "unreliable " and the dents i spotted in some rounds are FEDEx fault .. This all that despite the fact that my GP has shot 100 s of trouble free rounds the previous weekend and then locking up with this ammo and his ammo only. My buddies ancient 38 SPC Ammo functioned perfect afterwards as did my newer Fiocchi 125gr. I was unable to complete even a single drill with this ammo. This Ammo is badly faulty.. I have never experienced something like this before and to think I almost cached it.. Verdict.. not even nearly good enough to be training Ammo. Sad the guy would not take it back, he responded to a previous request for tracking number quickly and positively + well after business hours which impressed me so I really wanted to like this ammo. But his responded to my email tell him how the ammo was broke he responded negatively. But it is simply absolutely unusable Ammo, even by the relatively low standards I have for training. Since the company is not taking it back I will give the remaining 960+ rounds to a buddy to pull bullets and powder for reloading.