The thing about rear locking guns is the "Spring", or stretch developed in the receiver because of the distance between lockup. If you load and work your way up, the extraction will get "Sticky" long before any dangerous level is reached. I have a .243 that acts like that with box deer loads made by Winchester and Federal. Remington is fine and is accurate, while the others fly wild (6-8 group @ 100 yards). These two are for sure loaded hotter. The lever does not get stuck in the closed position, but it is uncomfortable to work the action open.
