Twist rate & bore size
02-05-2011 | 05:35 PM
#2
Typical Buck
Joined: Aug 2007
Posts: 766
Likes: 0
From: Central Connecticut
I will guess that the twist rate is 1 in 48".
The land to land bore size should be .54.
The groove to groove bore diameter would be slightly larger based on the depth of the rifling grooves.
The depth of one rifling groove should be doubled to obtain the groove to groove bore diameter.
The land to land bore size should be .54.
The groove to groove bore diameter would be slightly larger based on the depth of the rifling grooves.
The depth of one rifling groove should be doubled to obtain the groove to groove bore diameter.
Last edited by arcticap; 02-05-2011 at 05:37 PM.
02-05-2011 | 06:29 PM
#3
Dominant Buck
Joined: Feb 2003
Posts: 21,193
Likes: 0
From: Wisconsin
There were some older CVA Hawkins that had slow twist barrels, but they are rare now. The new ones have a 1-48 twist. The bore diameter should be APPROXIMATELY .540 but there is no set standard. I would guess that a .530 ball and patch would work real well in that barrel.
02-05-2011 | 07:46 PM
#4
Thread Starter
Spike
Joined: Nov 2010
Posts: 55
Likes: 0
From: Linn Creek, Mo
There were some older CVA Hawkins that had slow twist barrels, but they are rare now. The new ones have a 1-48 twist. The bore diameter should be APPROXIMATELY .540 but there is no set standard. I would guess that a .530 ball and patch would work real well in that barrel.
02-06-2011 | 04:29 AM
#5
Boone & Crockett
Joined: Jan 2004
Posts: 12,823
Likes: 5
From: Eastern PA
If you want to get a rough estimate lay a piece of masking tape along the length of the ram rod and put a vertical line on it. Put your jag on and start a patch down the bore. Line up your line with a point on the octagon barrel and mark the rod at the muzzle. Push the rod down slowly allowing it to twist as it follows the rifling. When the line comes around (or half way around depending on barrel length) mark it again. Measure the distance between the marks and you got your rate of twist. Its not exact as it may skip but at least it will give you a rough idea.
