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Depends how you use 'em.
Some wrap them in a solvent or oil-soaked patch, though most use them plain, just dipped in solvent.
It also of course depends on the number of passes you make with the brush.
My own routine includes pushing the brush, after first soaking it in M Pro-7 gel, through the barrel from breech to muzzle, then back, a couple dozen times, then letting the barrel sit for awhile.
Used this way, I'll get probably 8-12 cleanings out of a bronze .45ACP or .50BMG bore brush.
Some wrap them in a solvent or oil-soaked patch, though most use them plain, just dipped in solvent.
It also of course depends on the number of passes you make with the brush.
My own routine includes pushing the brush, after first soaking it in M Pro-7 gel, through the barrel from breech to muzzle, then back, a couple dozen times, then letting the barrel sit for awhile.
Used this way, I'll get probably 8-12 cleanings out of a bronze .45ACP or .50BMG bore brush.
