Just a guess, but in most cases what people are referring to as the ring inside the 357 cylinder is mostly a carbon residue ring, build-up from the shorter 38sp cases. Not lead. I know in my revolvers this is the case. My only leading (and so far, thankfully, it's been negligible) has been at the forcing cone and sometimes down the grooves of the barrel.
Soaking the cylinder chambers in the best carbon solvent, then scrubbing with a good stiff bronze brush or the ChoreBoy copper strands wrapped around an old brush, should take care of most of it. One can get more aggressive (use a drill to turn the rod, use Flitz or another steel polisher), but at the risk of removing metal or otherwise creating wear/tear that is not neccesary to get the cylinders clean enough to take 357 cases easily.
I use only 357 brass, usually with light/moderate 38sp loads, in my two snubbies. This avoids most of the ring build-up. In my Model 66 I use 38sp brass, mostly because I had accumulated a nice stock before I decided to switch to the 357 brass-residue avoidance "model".
So using 357 brass regardless of load is one way to avoid/minimize ring build-up in your cylinders.
Soaking the cylinder chambers in the best carbon solvent, then scrubbing with a good stiff bronze brush or the ChoreBoy copper strands wrapped around an old brush, should take care of most of it. One can get more aggressive (use a drill to turn the rod, use Flitz or another steel polisher), but at the risk of removing metal or otherwise creating wear/tear that is not neccesary to get the cylinders clean enough to take 357 cases easily.
I use only 357 brass, usually with light/moderate 38sp loads, in my two snubbies. This avoids most of the ring build-up. In my Model 66 I use 38sp brass, mostly because I had accumulated a nice stock before I decided to switch to the 357 brass-residue avoidance "model".
So using 357 brass regardless of load is one way to avoid/minimize ring build-up in your cylinders.

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