Thread: Grouping problem 338LM

Originally Posted by Kiwi Greg

Yep any moisture anywhere + moly = corrosion

I don't know how much good HBN does, I have been using it for years, after hurting barrels with Moly.
I clean bugger all & once the rifle has settled down basically no copper fouling is evident even after 100-200+ rounds depending on calibre.
I don't really notice any carbon build up, although I don't have a bore scope yet, but don't know if I want one........
I have noticed that I have quite a few rifles now with silly single digit ES (more often that not), especially with mucking around with neck tension.
I haven't read or seen anything bad about HBN so I will keep coating all the pills for my own rifles, I'm careful not to use coated pills for customers rifles.
I haven't done enough testing yet to see how much difference it makes yet but will grab a nice consistent rifle & load to try with & without HBN.

This is all off topic but here goes -
I am still not sure of the merits of coating although in the case of HBN the great David Tubb cannot be wrong (can he??..??).
I toyed with the idea of changing to Danzac when it came along and ditto for HBN but basically when my 6.5 is eventually toast I will cease using coated projectiles altogether.
I am firing non coated in other target rifles and not having Cu problems.
The reason I went into moly with the 6.5 Ackley was more to test the point that the cartridge would have a barrel life exceeding the 6.5/284's . So I use moly (which won't stop throat erosion I guess) and Win 760 powder because of its lower flame temperature.