I was hoping that you might respond Bob. Thank you.
I have a rifle so rifled with Bill's stamp on a flat (WM Large).
It also has an "L" stamped on the muzzle. Thinking back, I believe I may have read that he stamped the muzzle of bores that he reworked.
Is that correct to your thinking?
Many thanks, Skychief
Bill did put the "L"stamp on recut barrels but not always.I don't know why he
would advertise left hand twists when there was no machine for it.
Bob Roller
There is one thing I nearly forgot. In the early 1950's,Bill bought rifled blanks from John Buehmiller
who I think lived in Montana. These may have been left hand twist.They were round and Bill would
change the shape of the rifling and then plane it octagon and usually installed a breech plug.
As I said before and having helped Bill modify Pratt&Whitney rifling machines by making transmissions
and a rack and pinion system that could vary a twist I have no recollection of any left handed ones.
Bob Roller