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Barrel matting (Read 455 times)

jhm Frequent Elocutionist Offline Posts: 1834 Location: georgia Joined: Sep 4^th, 2011	Barrel matting Sep 14^th, 2025 at 9:04pm	Print Post
	I recently posted a question about barrel matting about how it is done. Got a good response with several posting. I am working on a 22LR barrel for my Ballard kit. After cutting the octagon section I left about .010 excess on the top flat. It measured about .520 across so I had a 5/8 end mill I ground three of the flutes away on the end leaving just the one. I indicated the barrel flat in and touched off and cut a .005 deep pass. It made a perfect "swirlie" pattern. While most matting is straight or wavy lines I couldn't duplicate that so I used what I had. It certainly looks unique and if I change my mind I will just "erase"it with a pass from my end mill. Anyone else tried different methods of matting? JMH


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sureshot Senior Forum Member Offline Posts: 333 Location: Snohomish Joined: May 27^th, 2007	Re: Barrel matting Reply #1 - Sep 14^th, 2025 at 10:22pm	Print Post
	Shiloh Sharps Co. offers a machined matted rib on their rifles.


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AJ Full Member Offline Posts: 179 Joined: Aug 25^th, 2011	Re: Barrel matting Reply #2 - Sep 14^th, 2025 at 11:19pm	Print Post
	This is a thread on the topic on another forum: (You need to *Login* or *Register* to view media files and links)


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bnice Frequent Elocutionist Offline Posts: 1911 Location: Iowa Joined: Nov 30^th, 2006	Re: Barrel matting Reply #3 - Sep 15^th, 2025 at 6:49am	Print Post
	JHM how about a picture? Thanks


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GT Frequent Elocutionist Offline Posts: 2216 Location: Northeast Wyoming Joined: Jun 28^th, 2015	Re: Barrel matting Reply #4 - Sep 15^th, 2025 at 9:18am	Print Post
	JMH, Here's one I did a few years ago. I don't recall the diameter of the endmill, it was the largest I could fit between the barrels without touching them, 3/4" I think. Anyway, a two flute, relieved the center, ground what looked like a threading point on the face of each flute and allowed .015"? depth of cut. I fit, regulated and then milled the rib flat, sweat blood matting the rib and it turned out fair. G

	"To invent, you need a good imagination and a pile of junk" T. A. Edison "The trouble ain't that there is too many fools, but that the lightning ain't distributed right" M.T.
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John Taylor Frequent Elocutionist Offline Posts: 1798 Location: Lewiston, ID Joined: Oct 23^rd, 2006	Re: Barrel matting Reply #5 - Sep 15^th, 2025 at 9:45am	Print Post
	I have used a roll die many times but on thin barrels it can cause the barrel to warp.

	John Taylor Machinist/gunsmith
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bobw Frequent Elocutionist Offline Posts: 1874 Location: NW, Iowa Joined: Mar 19^th, 2013	Re: Barrel matting Reply #6 - Sep 15^th, 2025 at 11:05am	Print Post
	Interesting thread! I’ve been asked several time over the last few months if I could matt a rib. You guys have me thinking more seriously about it now. Bob

	Robert Warren
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2152hq Newbie Offline Posts: 9 Joined: Oct 18^th, 2024	Re: Barrel matting Reply #7 - Sep 15^th, 2025 at 3:47pm	Print Post
	GT wrote on Sep 15^th, 2025 at 9:18am: JMH, Here's one I did a few years ago. I don't recall the diameter of the endmill, it was the largest I could fit between the barrels without touching them, 3/4" I think. Anyway, a two flute, relieved the center, ground what looked like a threading point on the face of each flute and allowed .015"? depth of cut. I fit, regulated and then milled the rib flat, sweat blood matting the rib and it turned out fair. G Ithaca used the same technique (and got the same results!) on some of their early SxS models top ribs. IIRC up to and including the Flues model. Makes a very nice matting pattern.


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chipmaker Senior Forum Member Offline Posts: 353 Location: san diego Joined: Sep 24^th, 2007	Re: Barrel matting Reply #8 - yesterday at 12:03pm	Print Post
	I started top rib matting using a single point cutter to create different patterns using different speeds and feeds. The best patterns were those using the preceding system but with different starting points to create a pattern with the circular pattern on either side of a center line. This system required only a mill bed long enough to mill the top rib in one pass and a power feed table. The second matting attempt used a metal checkering file with and without a clamp on guide but was unsuccessful at least in my hands. My current method uses an engraving cutter to engrave lines across the rib and I've settled on 30 lines per inch. Otto


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