RE: 54 Caliber ACCU-CHECK Hard Cast Bullets
I remove plastic from the bore with a brass bore brush and some Butch's Bore Shine Solvent. In fact I brushed a barrel today after shooting over thirty sabots out. Although I never saw a hint of plastic in the barrel. Just something I do when I shoot a lot of sabots. I then swabbed with some Butch's Bore Shine Solvent on a patch and still there was no sign of plastic. After that I dry patched it and swabbed the barrel with Birchwood Casey Sheath.