I loaded up 100 rounds of 38 Spl ammo for a friend of mine. But almost half would not chamber in his 38 Spl revolver. Also he had two that failed to fire. I shot the rest in my 686+ including the two failures. They dropped in perfectly. The two failures fired fine. They were all loaded with the same COL and with 125 grain powder coated RNFP bullets. So what gives? Is there that much difference between pistols?