Suspect plastic fouling in a Stainless Black powder barrel 1:28 twist Ruger 77/50
Seen on line that acetone can be use to remove plastic fouling in a gun barrel,
Rifle has been very accurate for several years and started shooting about 4 inch groups. I installed a Leupold scope in place of the other Leupold and the rifle does the same. When inspecting the grooves in the retrieved sabots some of the groove lands look shallow to non existence..
Before trying acetone on a swab and or bore brush as recommended in on-line searches I did the following.
I took a plastic sabot like has been used in the gun for about 10 years and placed it in acetone for 48 hours and the plastic sabot did not soften or change in any way. The acetone will melt most plastics or soften them, but not these sabots.
This test leads me to believe that acetone is not going to remove the plastic fouling in the rifle's barrel's grooves.
I can plug the bore and do a flooded soak with a good cleaner if that is what is required.
Anyone know of a good plastic fouling bore cleaner or had any experience with such?????