chasseur,

...more than adequate explanation...

...i guess that would be a primary reason for sticking to low-pressure rimmed cartridges such as the 9.3, 470ne, etc...and i also suppose qualified gunsmiths would be able to remedy off-face problems...

...i wonder whether different lock-up systems (e.g., merkel system, beretta sso system, etc.) would affect the potential for off-face problems down the road...