| DarylS |
| (.700 member) |
| 28/06/10 09:15 AM |
|
Re: 20 ga DR build progress.
|
Quote:
Update 6/27
Good news.
Gun has arrived it is an as good as shape as when it shipped.
Bad news.
It is 0.003" off face, so we will bw rejoining it, a cost I was not planning for.
The barrel blank info:
8 Lands
1:24" twist, I am assuming RH.
0.615" Lands
0.620" Bore
All original internals no signs of tampering, decent remaining colors.
all in all very good except the off face.
Cheers
Nitro
Hmmm - You mean the bore is .615" and the groove diameter is .620" = .005" divided by 2 = .0025" depth of rifling?
That's quite shallow!
The bore is the samllest diamter, while groove to groove is the largest. In this instance, land height is .0025", ie; 2 1/2 thousanths.
Might have to use proepr sized balls - or, the plastic cup and ball method.