I don't see softness as a principal factor. Pure gold is very soft, yet unaffected by most chemicals.
As I believe was mentioned earlier some solvents containing ammonia will, with time, allow oxidation to occur and this does eat steel. It isn't the solvent per se.
Excellent point pertaining to pure gold and I understand your last paragraph. Perhaps you've answered my question and I've just missed it, but......will the KG-12 eventually etch the barrel steel?
During my marathon reading/research last night I read on 6mmbr.com that several bench rest shooters avoided it because it eventually etched their barrels.
