Andy221
Cast Iron
- Joined
- Mar 13, 2013
- Location
- moorhead mn
What do you guys think about using a collet to hold a barrel?
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What do you guys think about using a collet to hold a barrel?
I could see turning the OD of the barrel concentric with the bore and to a size of a collet. Then use the collet. Why, instead of a 4-jaw? A 4-jaw or any number of jaws will distort the chamber. Then again, so might the threads.
You must have King Kong turning the chuck key.
Dunham makes a nice concentricty adjustable collet chuck. Been using one for years.
You must have King Kong turning the chuck key.
How much distortion? As for collets, we played around with setups to see effect on accuracy. Built a 300rum in a 3 jaw with a piece of wire to allow for a pivot point and a catshead. The bore had .007 tir. Shoots as well or better than the others that were done with other methods. Best of luck
TIR and distortion can be two different things. With a 3-jaw chuck, there might and probably is three 'lobes' on the roundness of the chamber. Not sure if this would have anything to affect accuracy. I think HK has splines or serrations in their chambers.
They are typically used on rifles like the M1 and M14 which do not have clear chamber access from the rear.
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