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| Depends on how good you are with fiberglass.
I use a milling machine with ball end mills to do it. |
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| I’ve used Gunline barrel channel scrapers and they work fine.
John Farner
If you haven't, please join the NRA!
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| | | Posts: 2949 | Location: Corrales, NM, USA | Registered: 07 February 2001 | 
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| A flap wheel on a Foredom or a die grinder works well. A quality dust mask in a must and a vacuum hose helps too.
Mark Pursell
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| | | Posts: 545 | Location: Liberty, MO | Registered: 21 January 2003 |
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| quote: Originally posted by Toomany Tools:
I’ve used Gunline barrel channel scrapers and they work fine.
Ditto! I have a few different sizes
Jim Kobe
10841 Oxborough Ave So
Bloomington MN 55437
952.884.6031
Professional member American Custom Gunmakers Guild
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| A milling machine is THE method to use.
The channel can be dead on. I don't use
any other method. |
| | | Posts: 8352 | Location: Jennings Louisiana, Arkansas by way of Alabama by way of South Carloina by way of County Antrim Irland by way of Lanarkshire Scotland. | Registered: 02 November 2001 |
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| I do the first 90% with my duplicator then finish with the Gunline.
As usual just my $.02
Paul K
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| As with anything, it depends on the definition of "open up". If you mean "OPEN UP" from featherweight to most anything else, you can't scrape it.
If you mean open up from #1 to #2, then you can. |
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| Save your end mills for metal. Composites and wood dull them in a hurry. Try carbide router bits known as "core box" cutters. A much cleaner cut at a fraction of a big ball end mill cost, and they last forever. |
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| quote: Originally posted by Matt Norman:
I have a rifle in a McMillan stock that I want to rebarrel to a larger caliber. It might mean that the barrel channel might need opened up.
Is that a big deal?
Is it fiber glass or carbon fiber? Carbon fiber are super easy, sand paper works great. If its fiber glass then yes milling would be best method |
| | | Posts: 768 | Location: Camp Verde, AZ | Registered: 05 February 2006 |
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| quote: Originally posted by kendog:
Save your end mills for metal. Composites and wood dull them in a hurry. Try carbide router bits known as "core box" cutters. A much cleaner cut at a fraction of a big ball end mill cost, and they last forever.
 I do a lot of flat tops. This is what I use! |
| | | Posts: 42626 | Location: Crosby and Barksdale, Texas | Registered: 18 September 2006 |
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