I posted this under factory rifles, but didn't get many looks....
Was just at the range testing several different brands of slugs in this gun.
Remington
Winchester
Federal
All loads were 2 3/4 designed for rifled barrels.
Of the factory loads nothing seemed to group well past 50 yards except the Federal Truball loads.
While shooting the Truball rounds, the gun locked up. The bolt would operate, move from the closed to open position, but would not unlock and open.
After playing with the gun for 5 minutes or so the bolt was able to cycled open. The casing didn't look any different than any of the other that were shot from the gun. After cycling the gun a few times and looking things over, I mounted the gun in the lead sled and shot more than 10 rounds remotely (Remington and Winchester), the gun fired and opened as it should. I loaded gun with 3 rounds of the Truball, and after firing the gun three times the bolt locked up again. It appears that this gun doesn't like these Truball loads.
What say you, anyone have any ideas?
Scott