Two problems. Forty five Colt will not head space in a 45 ACP cylinder and 45 ACP w/moon clips will not allow 45 Colt cylinder to close. Chamfer in the cylinder and the gap between the cylinder and recoil shield won't let it happen. Two cylinders are needed. Second, the first Performance Center 625 with product code 170xxx prefix did not arrive till 1997, so a 1989 era 625PC is impossible. Will suggest getting a product code from your seller. The date is definitely wrong (Performance Center was started in 1990 and the 170xxx prefix producy code did even come into existence until 1992) and the gun is either 45 Colt or 45 ACP/45 AR (auto rim).