All my rifles are single shot. I have two CVA Wolf .50 ML’s (break-action with breech plug). They will throw a 270gr .44 Speer Deep Curl in a sabot at 1700fps. Hits like a hammer and is extremely accurate.
The other two big-bores are CVA SCOUT takedown 45-70’s. These are also tack-drivers, and will push a 405gr hard cast at 1400fps. These rifles have muzzle breaks, which tames the recoil considerably. I highly recommend the newer CVA lines of single shots; quality rifles at an affordable price...well, after the Covid thing, they have gone up, unfortunately