Lifter 10 bore dimensions
Many 10 bore lifter guns have bores .800 - .810 or larger; most bore gauges are for 12 and smaller, and the few bore measurements I have are with inside calipers. They may nominally be 13/16 - .812. An early ten with no choke can be mistaken for an 8 if the chamber is not measured.
The original brass shell chamber was 2 5/8; 2 7/8 is needed to fit the same load in a paper case. Winchester and UMC supplied cases or loads longer than this in case lots, and some guns may have longer chambers; but they were never intended for SuperX .
Best, Austin
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