| CommandCar |
| (.333 member) |
| 30/06/14 02:38 AM |
|
Re: Observations on a Lancaster shot and ball gun
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Quote:
I have acquired a Lancaster Shot and Ball gun, and after taking some measurements etc. have the following: Bores both at .730, 6 groove polygonal, very shallow rifling. Seems straight and uniform up to about 8" from the muzzle, where it imparts a slow twist, and about a light mod. choke. All this is very difficult to see, and I have no clue as to twist rate.
Doug
Doug,
Do you mind making an attempt to measure twist on your barrel? I really have to know. I imagine you would use a cleaning rod with a tight patch. Insert rod with patch into barrel, mark start location on rod, also put a mark on the top of the rod that is sufficiently long to not disappear in the barrel as the rod is pushed in. Push rod in and record stop location for 1 full turn. Mark stop location, the distance between start and stop would be your twist rate. If it is slower than your barrel length, you would measure 1/2 revolution length and multiply by 2 or, if really slow, measure 1/4 revolution length and multiply by 4.
Sorry for the step-by-step, but just I went through step-by-step on the off chance that you were unversed in determining twist.
Thanks for your Help.
CC
