I ran into an issue with my 930 and Froglube CLP. I shot a number of rounds of skeet and trap with some friends. After cleaning the barrel and action with FL CLP, I place a snap cap in the chamber and dropped the hammer (For a function test). I allowed myself to be distracted enough to leave the snap cap in the chamber and stored my weapon for a week and went back to the range for more skeet and trap. I ejected the snap cap into the gun case and paid no attention to it. We started shooting skeet and I noticed I was getting very light primer strikes after a failure to fire. I disassembled the shotgun and found red "gunk" throughout the bolt assembly. Very tacky to the touch, no smell, and would not come off by wiping with a range towel. I used some Hoppes# 9 solvent to remove the crud from the bolt assembly and gas system spring. I inspected the snap cap and found the plastic coating / annealing material gone and the aluminum surface quite pitted. This caught me off guard as I was not expecting that to happen. Called Froglube, they have "never, ever, ever heard of this before". I like FL on my carry weapon as it does not creep and has yet to cause problems for the pistol. I do not know why FL attacked the finish on the snap cap, so I have chalked it up to a learned lesson. I will not be using FL CLP on my M&P22 due to what happened with the snap cap.