I have used them both in .223 plinking loads for AR's and in .45 Auto. They are a good cheap option, if you could call current prices "cheap". CCI is my go-to and has been since I started loading, but the S&B primers I used to find consistently under $20/1000 so they were economical. No issues, I didnt notice oversizing like Plant.One said. They seemed to ignite just like CCI and worked safely in AR's. I would still limit them to strictly plinking ammo though, my hunting/self defense ammo gets strictly CCI primers.