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GarrettJ · May 13, 2018, 10:34 AM

While the High Tek coated bullets (most common coating used by commercial casters) does keep the bore very clean, it tends to deposit a really hard layer of plastic/carbon/crud inside silencers or muzzle brakes. This type of deposit seems to be much harder to remove than if you were to just shoot lubed lead through the can. I got one can crudded up to the point I didn't feel safe continuing to shoot it.

So I did a test, using a muzzle brake with a removable endcap which I could weigh before and after to get a deposit weight.

I found going to a slightly oversized bullet decreased deposits significantly. But switching to a copper plated bullet dropped deposits to virtually none.

So while I still use a lot of coated bullets for USPSA or general shooting, I stick with copper plated or jacketed for suppressor use.

Full write-up Here.

May 13, 2018, 10:34 AM	#4
GarrettJ Member Join Date: April 13, 2008 Posts: 94	While the High Tek coated bullets (most common coating used by commercial casters) does keep the bore very clean, it tends to deposit a really hard layer of plastic/carbon/crud inside silencers or muzzle brakes. This type of deposit seems to be much harder to remove than if you were to just shoot lubed lead through the can. I got one can crudded up to the point I didn't feel safe continuing to shoot it. So I did a test, using a muzzle brake with a removable endcap which I could weigh before and after to get a deposit weight. I found going to a slightly oversized bullet decreased deposits significantly. But switching to a copper plated bullet dropped deposits to virtually none. So while I still use a lot of coated bullets for USPSA or general shooting, I stick with copper plated or jacketed for suppressor use. Full write-up Here.