These are good for a pump shotgun, do not buy if you are using a turkish semi auto!!!!! - Sellier & Bellot SB 12 Gauge 9 Pellet 2.75in Shotgun Buckshot Ammunition

First of all, I have an old school Sears-Roebeck 12 gauge pump action shotgun, as well as an Centurion Opiti-1 Turkish AR-12 semi-auto shotgun. Both are my only shotguns and both impulse buy. Got one for 25 bucks for the pump, 280 bucks for the semi-auto, came with a case, as well as a red dot sight and a tactical flashlight. Now the ammo. These were Czech ammo company and the use European crimp, which means a roll crimp. When I used it for my pump, the ammo was flawless. I used 00 buck with 9 pellets, as well as the 00 buck with 12 pellets. It straight f***ed s**t up. It was a lot of fun because the shotgun reloaded quickly. So no problems. But next came the semi auto. The ammo said that she'll was 2.75 inches. The first thing I used was a 20 round drum. I was so excited to break that thing in, as well as 3 brand new 10 round magazines. I tried to put in the 00 buck 12 pellet round, but it would not fit in the drum, like AT ALL! So I looked at the 12 pellet ammo and realized that they were longer than the 9 pellet ammo. Well d**n, I only had like 10 shells so we used those in the pump. Now, back to the 9 pellet. I went to the drum, and what do I know, those didn't fit it either. So I went to use the 10 shell mags, and I could fit them in the mag, but barely. Hmmmmmmmmm. Alright, so let's try it. After the first round, I got a pipe jam. Alright, cleared it, and the second round got a mag jam. I used the bolt and the shell went in to the barrel, 2nd pipe jam. Then 3rd, 4th, all the way down to the last 3 it cleared it and no mag jam. Well heck, maybe it was brand new, maybe I had to break it in. Same this again after I realoaded the same mag. Well d**n. I have like twelve 00 buckshot 9 pellets with 2.75 shells but using a American fold crimp. I compared the roll vs fold crimp and realized they were just maybe like 5mm long vs a fold crimp. So I loaded up the fold crimp shells using the same magazine and what do you know, one in the chamber as well 10 in the mag and all shells were cleared, no jams. Then I tried it again using the same magazine and there it was, 7 pipe and mag jams but the last 3 cleared. Moral of the story, NEVER BUY 2.75 INCH ROLL CRIMPS, THEY ARE TOO LONG, EVEN THOUGH THEY ARE ONLY 5MM LONGER. THEY WILL JAM. THIS IS ONLY FOR A PUMP ACTION SHOTGUN. I still give a 4 star review by because the ammo works FANTASTICALLY as long as you uses a tube for ammo, but WILL NOT USE a magazine with a bunch of jams. I could still fill 5 rounds in the tube and one in the chamber, no problem. Those Turkish semi-auto magazine and bolt is SOOOOOOOOOOOOOOOO FINICKY. If you want to use cheap ammo, look at Turkish ammo with slugs. I got them for 55 cents per round on ammo seek. I was able to use those with my AR-12 20 round drum, and they all cleared and as well the 10 round magazines, and it was a lot of fun. Make sure you use a fold crimp or maybe using shorter shells like maybe 2.5 inch shells.