Greetings, I have a Typhoon Defense X12 semi-auto AR-15 style shotgun, and I found a good deal on #4 buckshot and bought a few boxes. The ammo I got is Rio Royal #4 Buckshot with 21 pellets in each shell. The fps is 1345 and I was wondering if anyone had any info on if these shells would feed reliably in my Typhoon X12. I've already put some heavy rounds through this shotgun to break it in, and the Rio shells were the only ones that I could find that were available for purchase, and I really hope I did not make a bad decision in buying these shells.