Hello, I note there is mention of using Rosin in some lube mixtures. Now I first heard of this stuff back in the early 1970's, when I nearly wore out the pages of Phill Sharpes Complete Guide To Handloading..I used to check it out of the library...heck, I wasn't even loading yet.
I understand Harvey Donaldson and others in that time frame used it.
Donaldson said a lube with it provided lubrication "with drag". He felt it allowed the smokeless to build pressure behind bullet.
There has been some discussion of bore wear from it's use..one author mentioned his barrels 'just shine" after using it.
Any comments? Thanks.