Undersized bullets, either initially or from seating in the tough 9mm or .40 brass, has caused serious but easily avoidable issues with Glock barrels in particular. More of an ignorance plus lack of proper attention to bore condition thing than a fundamental problem.
I don't own a 10mm, but would think that if Longshot worked well (aside from its almost un parallelled affinity for plastic coatings) True Blue would work even better. IDK if it is flash suppressed or will react with black poly powder, but it is superb stuff for magnum handgun loads. I would think Western would have mentioned True Blue in the email if it was flash suppressed.
Power Pistol will produce a fireball at night that has to be seen to be believed.