Folks,
Here is a question for ya regarding fluted barrels for the .45-70 cartridge. I recently was given some fired 45-70 brass of the Hornady flavor which of course is too short to trim thanks to their LEVERevolution ammo brand. I noticed the brass was delicately impressed with negative flutes from the chamber about 1/3 of the way down from the case mouth. The flutes were not like the kind found in military grade hardware whereby the case is suspended in a gas cloud but these were more delicate. After resizing the case, the flutes are still discernible to the eye and can definitely be felt with the fingers when the case is rolled between finger tips.
Do you have any idea what brand of rifle (possibly a lever action) has a delicately fluted chamber for the .45-70?
I have loaded these up with 40gr of black powder and a filler to shoot in my T/C Contender since the J.D. Jones loads are getting a tad abusive for this old guy.
Before you ask me, it is not a cannelure. They are flutes, vertically oriented, flutes.