.22 ammo

I don't think it makes a difference. The copper on .22 bullets is not true copper jacketing like on centerfire cartridges, it is a very thin copper wash plating. It is so thin that you can scrape it off with your finger nail if you try.

Cheers
 
ckid has it, its not jacket per se, but a copper wash or other alloy in the case of Remington "golden bullets." .22 WRM does use a FMJ type bullet.
 
A real target shooter with a big buck gun will never put a unlubed bullet down his barrel. No copper plated.

I don't think it matters much. For a normal shooter, barrel wear is not a factor. Lubed bullets are usually more accurate. You won't find copper plated target ammo. Copper plated is fine for plinking.
 
Why Slash? The copper wash gilding material is softer than the barrel, so it can't be a wear thing. Is it a fouling thing?

Is it that lubed bullets are more accurate, or is it that more accurate bullets are almost always lubed? Is it the same principle as lubed, hard-cast black powder bullets?
 
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As someone who shoots around a 1000 - 3000 .22 rounds per month, I have to say IMHO the Copper wash is cleaner in semi auto actions then the soft lead bullets.

2 passes with a Hoppes dipped bore snake cleans the rifle...but 4 passes is needed with lead which seems to get all over the place inside the actions.
 
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