Thread: Blank barrel

Hi Homebrew.
If I followed your process correctly, wouldn't your 6 th groove not as deep as the first one if you take into account cutter wear?

When I used to regularly visit Border barrels in Scotland, I think that his Pratt and Whitney rifling machine was indexing the barrel at each pass of the cutter, and after 1 or 2 full revolution the cutter was self setting out for the next set of passes. That way the wear is even on all the grooves .
By the way, if you happened to wear out a .458" barrel, don't throw it away, just rebore it to the next caliber ,(475 or 50) and rerifle it.
There are two or three companies in the USA who offer reborring and filling services.