Originally Posted by Kevin Thomas
If it can't damage a barrel . . . how can it help a barrel?
It won't help or hurt a barrel that doesn't need it.
It can damage a bore if used incorrectly/excess, -as everything can.
In good bores:
Where JB is useful to manage carbon(the ultimate killer of bores), Tubbs is useful to dress up lands and prolong a good lap. You don't fire the whole hail mary kit or anything like that. You just break in and run a few every few hundred rounds.
In bad bores:
Tubbs is better(IMO) at knocking out accuracy robbing restrictions and roughness, where it's a problem, than is practical with JB bore paste. You might use the whole kit here, but I've yet to hear of a barrel shooting worse after Tubb's FF. Have you?
All I see out there are reports of improvements, and baseless ramblings of naysayers.