I have a Beretta SXS hammer gun probably made in the late 70's. The bbl flats are stamped 28 cal. chokes are stamped 13.5 in both bbls.
The owner wants the chokes opened and a firing pin and bushing made , (both are missing). I made a new bushing based on the dimensions of the existing bushing,
but it is too small on the thread diameter. The existing thread is .285 diam x 32 tpi. which should convert to 7mm x .8. I have not determined what the other bushing thread is.
When checking the bore diameter it only measures .531" while a 28 ga should be .550. Could it be that these bbls are actually a 32 ga and only the chambers were opened at the factory
but not the bores? Any constructive input would be appreciated
