I only shoot hand loads and have just recently noticed last outing that my barrel on my Sig 556 had a lot of copper fouling.
I have always used Hornady 68gr BTHP and 60gr VMax.Since there has been a low supply on the Hornady,I started to use the Nosler 69gr BTHP and 60gr varmint BT.
Took several hours using M-Pro 7 to get all the copper out of my barrel.
The Nosler advertises it as a ultra-thin jacket mouth bullet.
Has anyone else have problem with the Noslers? Not seen copper fouling from the Hornady.
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