[TheForge] filling pipe with sand to bend

[Andrew Vida]

On 11/7/2012 4:12 PM, Garrick Peterson wrote:

> I've also watched them re-shape a bent pipe using a ball bearing with an
> outer diameter equal to that of the desired inner diameter&  smaller ball
> bearings to push it through, but it seems like that also requires very
> accurate forms.

That will work.  It is, in fact, the method I intend on using to remove 
a small dent from a shotgun barrel.