condor bravo
New member
For reduced loads for several rifles I use Trail Boss powder and the black molybdenum coated bullets (as well as standard lead bullets). Two rifles using the MCB’s are Rem Mdl 700 .458 Win Mags and one developed pitting in the chamber (but not in the barrel itself) that eventually became so bad that case extraction was extremely difficult (upon firing, brass would imbed itself in the pits) and required a barrel replacement. Pitting occurred in the forward half of the chamber at about the 1:30 position.
The pitting might suggest rusting but there was no indication of any rust whatsoever, anywhere. The rifle was always stored in an upright position and was never exposed to any excessive moisture. The pitting did not develop overnight but became worse and worse during several months of shooting.
Question 1:
I had read somewhere that moly does attract moisture. Those of you who have used MCB’s, what are your opinion and knowledge of them--favorable, unfavorable, or just neutral?
Question 2:
I’m assuming, or hoping at least, that the pitting (and rusting if any) was not due to the moly coats. Has anyone out there experienced anything similar, and/or knows how this pitting might have occurred?
The pitting might suggest rusting but there was no indication of any rust whatsoever, anywhere. The rifle was always stored in an upright position and was never exposed to any excessive moisture. The pitting did not develop overnight but became worse and worse during several months of shooting.
Question 1:
I had read somewhere that moly does attract moisture. Those of you who have used MCB’s, what are your opinion and knowledge of them--favorable, unfavorable, or just neutral?
Question 2:
I’m assuming, or hoping at least, that the pitting (and rusting if any) was not due to the moly coats. Has anyone out there experienced anything similar, and/or knows how this pitting might have occurred?