I bet it would work just as well, since it's designed to break crud and rust up.. great tip SEMI.. Ray

I did not have any trouble at all cleaning my Prohunter barrel before I shot it. I just gave it a regualr cleaning and it was shining.

when using kroil or liquid wrench let it soak over night and just keep running patchs with kroil or liquid wrench every hour down the barrel before you start to clean it this will help brake it up then use a brash you may have to do this more thing once hope this helps

If you did not JB the Pro Hunter bore you may want to consider it. It may look clean like my buddies did until I hit it with JB and showed him what the patches looked like. He was amazed at the ease of loading saboted bullets when we hit the range. My sons Triumph looked spotless too but loaded a little harder then I wanted it to. I JB'ed it and it loads beautifully now.

X2 on that! Ray

No matter if a barrel is clean or not, JB's will always turn black when fiction is applied. Just take some JB's and rub between two swabs. It will turn black.

Yeah I know it will turn black its brown to begin with. I have used it enough to know that its doing its job pulling fouling or packing lube from the rifling. It turned a few of my harder loading muzzleloaders into great loaders.

I wonder if plugging the breech and pouring kerosene down the bore and letting it soak a while would work. I bought a used 700 once that the trigger was really rusted. I soaked it in a wallpaper trough filled with kerosene for three days. Took it out, used my wife's toothbrush to scrub it up, worked the action/trigger a bunch of times, wiped it off and oiled it up and it worked fine. In fact I still have that old rifle.
Excuse my rambling, but the point is, kerosene may loosen that crap up. That or some really hot water and a good brass brush scrubbing with soapy water (Dawn) and another hot water rinse.

Did ya just throw it back in the holder when you were done? :lolabove: