what is the problem with brass brushes

a question, why do people get so anti brass barrel brush.? my logic would be that the barrel is harder than the brush and shouldn't do any damage. could someone enlighten me on this please.

I wrote to air arms and asked them if it was OK or if it held a chance of damaging the barrel. I'll post it when I get the answer. in the meantime I'd be keen to hear more views or experiences with the afore mentioned cleaning brush. ( real life experience trumps)

As stated, air gun barrels are fairly soft by steel standards. I wouldn’t use anything metal in an airgun barrel, especially something like an air arms.
Once or twice will likely be fine, but repeated use could dull the rifling lands.
I’d suggest a bore snake without a brush, or a pull through with fabric patches.

Best tip is to clean the barrel when new then only again when accuracy drops off. Airgun barrels don’t need a lot of cleaning, pellet lead fills pores in the steel and cleaning removes this.

airgun barrels will allways over time get a very thin build up of the soft lead used for pellets but unlike a firearm barrel this fouling dosnt include burnt powder fouling deposited in the barrel under very high temps that bakes the fouling into firearms barrels,lead and copper jacketed bullets allso leave fouling in firearms barrels this can be very hard to remove and normally requires bronze brushes and solvents to remove,airgun pellets are normally very soft lead some of which will strip from pellets when fired adhering to barrel,this will build up over time if not removed regularly,but its very easy to remove with just cloth patchs,airgun barrels are generaly softer steel than firearms barrels proberly because airguns dont operate at the significantly higher pressures of firearms,barrels are soft enuf that bronze brushs will damage the rifling over time and bronze brushs are just not needed to clean airgun barrels.there is plenty of excellent info on cleaning airgun barrels on most airgun forums that can explain this better than i can but there are very good reasons for not using bronze brushes to clean airgun barrels.