Jim Muller, the President of Muller Chokes explains in detail how to use this special lapping compound.
Use this Aerospace/Defense special lapping compound to clean carbon, plastic, rust and any other crud from your choke threads, in your barrel, and on your choke.
Just put a small dab on any choke tube that fits your gun and screw it in and out a few times using one of our choke wrenches and your barrel and choke tubes will be like new again.
This stuff works like magic
Helpful. My U1 chokes are both tight. I'm guessing IOSSO might also work too