How did they do the rings on a model 12? I would like to deepen a few on a worn forend, any advice?
My guess ( no direct info) is they likely did it in a lathe, before letting the barrel in.
That was my first suspicion. Thanks Mike!
Rick, I've handled M 12s, but don't own one, so I ask ........ are the grooves flat bottomed?
Itís hard to tell but it appears they are not flat.
I was thinking of a file that was the right shape ....... round, for concave bottoms of the grooves ........ flat if they were flat bottomed, grinding off the sides to "safe", then lightly having at the worn grooves.
Thatís a good idea! Thanks!
There is another way to make the sides safe on a file. Use epoxy to fill them in. Leave the edge clean. Deepen your grooves. Then if you want heat will often pop the epoxy off the file so you can reclaim the file.
Industrial supply houses like McMaster-Carr sell abrasive cord in spools of various diameters and grits to clean out, deepen and/or remove finish from the old style wooden forends of American repeaters. For polishing or refinishing, I've used various kinds of cotton cord.
No- they are rounded or radiused> RWTF
Luckily, you will not have to make your file "safe" if you use a round file. The grooves are round bottom. Most wear on a Model 12 forend is the grooves being filled with oil, varnish, and sweat. Clean out the grooves with acetone or another varnish remover.