Lever guns, like Marlin and Winchester, where rounds are fed from a riser or elevator, entering the chamber at a slight angle, the chamber has to be set up to allow for that. Those chambers can never be as tight as a custom 5 shot revolver cylinder.
So, you're going to get more stretch with those cases than with cases used in a tight, custom chambered six gun..
DF
True. Very true.
Add to that there is minor "spring" in the bolt since it locks up in the rear of the bolt. The '86 and '71's are much heavier bolt/ receiver in those areas. And others.
