I switched my 357 Max barrel to a brand new SB2 frame I bought last week. The barrel was a loose fit, a beer can shim on the pivot (thinks grcank) made it lock up tight. At the range today I started with a few 38's I'd loaded to make sure everything was OK and bang, bang, bang. Next I loaded up a 357 Max round that works great on the SB1 frame, and click. Rotated the case, made sure it locked up solid, and click. Grabbed another round, made sure it locked up solid, and click. Rotated the case, click. Switched to a different forearm, click. Loaded a 38, bang. Seeing this wasn't working, I switched to the hornet barrel (came on the new SB2 frame, another post coming on that), everything went bang. The Max is loaded with small rifle primers, and the Hornet ammo was Remington factory ammo, so I assume it's small rifle primers too. The Max primer dents are very small, much smaller than 38's and about half the size of the hornets. Is the Max barrel locking up enough so the pistol primer fire but the harder rifle primer won't?