4597
.30 Stingray
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Post by 4597 on Aug 21, 2016 17:19:19 GMT -5
Just wondered if anyone ever did an 11 degree forcing cone with a lathe? (on a handgun)
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Deleted
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Post by Deleted on Aug 21, 2016 17:33:10 GMT -5
I cut 'em with reamers and gauges I get from Brownells.
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4597
.30 Stingray
Posts: 182
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Post by 4597 on Aug 21, 2016 18:27:27 GMT -5
Well that's what I figured on doing just wondered if anyone did it. Thank you.
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edk
.375 Atomic
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Post by edk on Aug 21, 2016 20:32:35 GMT -5
Just wondered if anyone ever did an 11 degree forcing cone with a lathe? (on a handgun) Kind of an interesting question from the perspective of it being about the only acceptable way to go about it. Sure, Brownells makes tooling to do it on the gun (as do others) but when most forcing cones are oversized to begin with and you are only going to make that situation worse, what would be the point when the barrel should be set back (using a lathe!) to prevent this?
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aciera
.375 Atomic
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11 degree
Aug 21, 2016 20:43:57 GMT -5
via mobile
Post by aciera on Aug 21, 2016 20:43:57 GMT -5
You want to be Zactly on center or at 11 deg it gets off center quick.
Not really bad.
No self centering with single point.
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Post by Lee Martin on Aug 21, 2016 21:13:36 GMT -5
Never been a fan of reamers for forcing cones. If you have a lathe, the dead nuts way to do them is as follows: 1) Use a horizontal dial test indicator to center off every groove. We aim to indicate each one within 0.00025" or less (more often than not they all peg 0.0000"). Don't dial to the outside diameter. That assumes the bore is drilled absolutely parallel to the total contour. 2) Set a boring bar to whatever degree you choose. We normally do 11. 3) Cut the forcing cone. We line-index our throats so I don't expect the bullet to need much correction. Thus I keep the cone short. If the cylinder is properly fit, get the bullet into the lands ASAP. 4) The last step is to finely polish the cone with 800 grit. -Lee www.singleactions.com"Chasing perfection five shots at a time"
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Yetiman
.327 Meteor
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Post by Yetiman on Aug 21, 2016 22:32:08 GMT -5
The one on my Bisley Hunter was done on a lathe by David Clements. It was also faced and the shoulder set back to tighten the gap in conjunction with other work. The result:
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Post by Rimfire69 on Aug 22, 2016 6:35:02 GMT -5
Love the pictures Lee
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Post by squawberryman on Aug 26, 2016 19:17:13 GMT -5
Just an observation about the distance from the barrel face to the top (bottom?) of the land on each gun pictured above. Is the gun in the photo above Taylor throated sir?
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Yetiman
.327 Meteor
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Post by Yetiman on Aug 26, 2016 20:50:11 GMT -5
No, it isn't, just an 11degree cut from David Clements. If i recall correctly, the factory cone was pretty deep.
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