FrankenCub
.338 Win Mag
I used some Hoppes oil my dad gave me when he was alive.I fail to see how that would be the Hoppe's fault. Did you re lube it after you used it? Hoppes is a cleaning solvent, ot strips oil and grease, it doesn't lubricate or offer corrosion protection.
I've just been a bit shy about using their lubrication products since that happened. I've used their bore solvents, and still do, but stopped their oil.