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Barrel turning question
- Thread starter Jeff K
- Start date
- Replies 6
- Views 4,476
yinou
Plastic
- Joined
- Apr 9, 2012
- Location
- Noth Idaho, USA
Put a gauge pin in the bore (very carefully) that is just close enough not to rotate easily and the indicate off the pin. It's your barrel so you know you need to be careful chasing the gauge pin size, from small to large alternating between go and no-go until it's just right. I was so nervous about doing to the muzzle that I made up a set of brass gauge pins to work in 308 bores.
FredC
Diamond
- Joined
- Oct 29, 2010
- Location
- Dewees Texas
Since the bore is probably .299 to .301 it will not take to many tries to make a gauge with a light slip fit. You will probably need a screw chuck (Spider chuck or cats head) on the opposite side of the spindle to help stabilize the barrel and allow for bore crookedness. I made one out of a scrap piece of bronze for my 9C. 30 years ago when I made it, a tool and die make said to put 3 screws in it, that was a mistake 4 screws is the way to go. So make your pin, then make a screw chuck, then you are ready to thread. Otherwise you may spend 2 hours trying to get the barrel lined up and find you have to start over or be tempted to finish it with a bad set up.
Anvil Jenkins
Hot Rolled
- Joined
- Jan 18, 2013
- Location
- Ohio, United States
Really with an Interapid indicator they indicate just fine right on the bore, you can "see" the lands and grooves.
GenePoole
Cast Iron
- Joined
- Dec 8, 2012
- Location
- St. Louis, MO
I posted this in another thread, but it seems applicable here. It's not that hard to determine, even with the rifling grooves.
I posted this in another thread, but it seems applicable here. It's not that hard to determine, even with the rifling grooves.
That was the ticket. Thanks
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