I think my Bisley 5 1/2" .45 is on the slow side. I'm getting around 1250 fps with the 250 gr. XTP, 26 gr. 296 and CCI350. The barrel has had the Taylor throating treatment and I think that is costing me some fps. Can anyone compare a similar load/gun combo to mine for fps?
I have a 6" barrel on my Bisley 45 and with a similar load, 26.1 grains of H110 and a 250 XTP and WLP primer, I am getting similar velocity as you. I honed my throats to .452 so that bullet will just pass through without resistance. The groove diameter on my gun slugged at .4505
