I actually found some reloadable steel cases while out shooting last week. They were still in good shape so I decided to give tham a try- I've never shot any steel cased ammo in any of my AR's . So I deprimed and loaded them up with a load of 24.5gr BM and 55 gr FMJ's( not a top end loading). Took them out an put them through my PSA carbine, have to remember not to use bolt release to load first round. I had to mortor rifle when the first round failed lock up. With use of charging handle fed just fine. Shot 10 rounds down range zero problems. At 100 yards with 4MOA Reddot about 3" group. No split cases, pockets still tight, rims good loaded for 2nd firing we'll see how it goes.