Looking in advance for any issues in rebarreling a .410 bolt action shotgun to a rifled barrel .45 ACP of 16+ inches. Any secret rules involved in this permanent swap ??? Those great old Spanish Destroyer carbines are today gone with the wind and using a full size Mauser '98 seems a bit overboard.
My modest reloading comparisons seem to indicate that the .45 ACP has a bit less breach thrust than does the .410.