Thread: Copper Bullet Performance On Deer

Originally Posted by 7mmsaum

And then clean all the coppers copper out before going back to cup n cores and J4 jackets

Ron Spomer reckons done in this sequence that the monometal copper fouling doesn't seem to affect accuracy very much of cup 'n core bullets. But he found accuracy of monometals could improve considerably if the barrel is first cleaned of copper fouling of cup 'n cores.