| simonsaorsa |
| (.300 member) |
| 01/02/10 06:06 AM |
Re: BSA Sporter Wreck - Shooting 8mm from 303 barrel
|
re the ball bearing process, my 1968 Parker Hale catalogue describes at some length a process they call "Ball Burnishing" they apply to 303 barrels to bring them up to match quality - they talk of levelling out internal imperfections and work hardening the surface.
hope this helps explain