Fired it today. 9 rounds Trailboss 230g cast, fired fine, not accurate. 20r Unique 255g Copper plated. Good for accuracy 6" group 50y but too hot, cratered and flat primers. Then fired three rounds W231. Guess what that sucker moved, about an 8th of an inch out of the sleeve. I was using way too hot of a load also. Messed up and had about a double charge of W231. I miss read the load data. Too much powder and too heavy a bullet. Fired three rounds and quit. Blew the primers right out. Not pierced but out of the case and the shells separated. The shell on the left is the Unique, the next is the last one fired. Receiver fine, barrel looks good. Need to press er back in and pin it better. I bought a lottery ticket on the way home, I felt very lucky. Also learned a valuable lesson. Double check all data and use light bullets in the ACP.