I'm working on using up three flats of B & P CompOne shells. They're low pressure at about 6500 psi or less, and perform admirably, except for the fact that they misfire badly in most of my guns, vintage and modern. I might have gotten a bad lot, but others have told me they had the same issue with them. The problem is that they sit too deeply in the chamber and it causes light primer strikes. Thanks to a friend I have found a solution to that problem that makes them fire with 100% reliability. But, I'd be reticent to buy more of them unless I knew the issue had been resolved.