I tested my blend of Smokes Copper with a bit of HF red (added trying to get rid of it) with Power Pistol as I use it for my 38sp factory duplication practice loads. A month in a pill bottle submerged in powder did absolutely nothing. My ammo boxes hold 38sp ammo bullet down the partitions are not wide enough to take the rims. The ammo functions just fine with no noticeable difference in accuracy after a year and a half stored nose down. Your use may vary but I am convinced it is much ado about nothing.Power Pistol does.
I loaded AA #7 in 10mm and would be my suggestion.I'd be interested in what Power Pistol does.
I don't have any to test, but I would by some if there was no reaction.
I bought thebBE-86 to use in the 10mm, but it seems to react with PC