[7.62x54r]

I don't typically use brushes, only a jag and patch, unless it's a neglected bore. In that case I generally wear out one or two brushes on the one rifle. I buy them by the dozen and pay about $1 each, last time I bought any. Either MidwayUSA ("best" quality) or ProShotProducts. I used to clean them with brake cleaner to try to make them last longer but figured I was spending as much on the brake cleaner as I was saving in brush life and just creating a "hazardous materials" situation in the basement.

 

[7.62x54r]

The original Hoppes #9 is designed for corrosive ammo also. It says so right on the bottle.

 

[7.62x54r]

I have heard of a "new" Hoppes #9, I just wouldn't waste time looking for it or money vs. the old. (I don't know that it's more expensive, just assuming it is. Remember, Satan was the first "ad man". )