Lol
That’s the report I got as well but they are a cool part of history.
Hi,
Yes they are. I tried all the way down to a 6 twist and could not get them stabilized. Then to find out they "really" were meant to be used in a tapered/tightening or whatever the hell the technical term was used for the barrel interior shrinking from breech to muzzle.
Those along with the 1690gr 50cals from the GS Customs are piled in a history box somewhere with all the paper data from Yuma used to write the old Cheytac ABC program, lol.
Sincerely,
Theis