Thread: BSA 12 15 TO .22 HORNET CONVERSION

Originally Posted by gundoc

The breech block has to be converted to centrefire by annealing, boring out the face and fitting a hardened bushing and fitting an offset pin in the striker. The back of the action is bored to 3/8" to accept a long custom-made reamer, and the chamber and extractor are cut together. Easy enough for someone with skills.

@gundoc by fitting the hardened bush you didn't need to re harden the whole block when finished ?

I have a 1215 here and might drop the parts out and look at what's involved

Or I could modify the block to CF and colour case harden it and get the same result