I read that with great interest Richard. Wonder what the pitch would be in a 25 caliber?
I need to buy some more barrel blanks with the various lengths and pitches for riling guides to use in the scrape cutter. Actually shot out barrels would work fine too as all their doing is chasing the pitch into the new barrel via lap/chasing slug. Don't need perfect rifling for that!
Talk about traditional, this is just about the simplest type of rifler ever made, seen pictures of them used in the Appalachians by the hill folk for their barrels. Much easier than carving a new wood, pitch drum for their machines,last longer too and doesn't warp. Mike D.