wrong bore brush?

**American1776** · May 18th, 2019, 09:07 AM

I was cleaning a SIG P220 (.45 auto). This barrel is chrome lined. I grabbed a copper bore brush, sprayed it with Ballistol, and sent it down the bore twice. Only after did I notice it was marked "410 bore". Since 410 is smaller than .455, Am I correct to assume that this did not do any damage to the bore?

thanks.

**Walleye Hunter** · May 18th, 2019, 09:10 AM

Can you even damage a bore with a brush?

**gghbi** · May 18th, 2019, 10:00 AM

Originally Posted by American1776

I was cleaning a SIG P220 (.45 auto). This barrel is chrome lined. I grabbed a copper bore brush, sprayed it with Ballistol, and sent it down the bore twice. Only after did I notice it was marked "410 bore". Since 410 is smaller than .455, Am I correct to assume that this did not do any damage to the bore?

thanks.

I would say yes to no damage, it takes a lot of effort to damage a bore, especially one that is chromed.

**Delkal** · May 18th, 2019, 10:48 AM

It is close to impossible to ruin a barrel with the brass brush. But you can ruin a barrel with the rod. It is best to use a coated rod and never have the rod touch the bore. And use some kind of bore guide when cleaning rifles.

Also If you use a bare aluminum rod throw it away or give it to your worst enemy. The soft aluminum picks up all kind of grit turning it into sandpaper.

**cdi** · May 18th, 2019, 10:49 AM

You didn't damage it (but you likely didn't clean it very well).
Damage to the bore can occur with a tight fitting brush that is reversed in the bore before exiting- the bristles get pushed into the steel when backing over the cam point.
Stainless steel brushes are the worst, they can scratch the shit out of the bore.