I have put out the Bat Signal for Baldy and TOF.
If you're really worried about the bore then use a bore snake rather than a brush but I have not heard of a bronze bore brush causing damage to a barrel.
I clean my guns at least every other range session. Especially if you are shooting lead, you will get build-up in the barrel. Worse things can happen with the increased pressures/heat resulting from lead fouling in a barrel than from proper cleaning from a bronze brush. Just my point/0/2.
Having said that, there are some guys here who clean there firearms rather infrequently, but not out of fear of damage as far as I know. To each his own, I guess.