barrel relining service?

calibrator · 10-27-2019, 10:47 AM

.0015-.002" is a LOT of clearance. You need the liner and barrel to have at least a slight press fit for heat transfer and stability. I'd forego the Loctite. Even the high temp version will liquify with enough heat. The liner creeping over time could be an issue. A step at the muzzle end would be ideal depending on how it's formed.

I'd shoot for a .0005" (maybe even slightly less) press fit. Heat the barrel and cool the liner with nitrogen or dry ice. Get a decent chamfer on the leading edges of both mating parts.

I'd be choosing the 1:7 twist.

I recall when the C96 Forum used to on-line, and seeing some pics of barrels re-lined by the Broom Closet. The liners were definitely off-center when viewed from the muzzle. Many complaints about wildly off-axis round impacts as I recall.

Go with the sheepherder, he's got the knowledge from actual experience. I'm trying to relate my experience with making valve guides for racing engines.

Good Luck ! Your mileage may vary !

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10-27-2019, 10:47 AM	#6
calibrator User Join Date: Feb 2009 Location: Cave Creek Posts: 340 Thanks: 67 Thanked 271 Times in 108 Posts	.0015-.002" is a LOT of clearance. You need the liner and barrel to have at least a slight press fit for heat transfer and stability. I'd forego the Loctite. Even the high temp version will liquify with enough heat. The liner creeping over time could be an issue. A step at the muzzle end would be ideal depending on how it's formed. I'd shoot for a .0005" (maybe even slightly less) press fit. Heat the barrel and cool the liner with nitrogen or dry ice. Get a decent chamfer on the leading edges of both mating parts. I'd be choosing the 1:7 twist. I recall when the C96 Forum used to on-line, and seeing some pics of barrels re-lined by the Broom Closet. The liners were definitely off-center when viewed from the muzzle. Many complaints about wildly off-axis round impacts as I recall. Go with the sheepherder, he's got the knowledge from actual experience. I'm trying to relate my experience with making valve guides for racing engines. Good Luck ! Your mileage may vary !