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Opening barrel channel on McMillan stock

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13 February 2023, 05:21
Matt Norman
Opening barrel channel on McMillan stock
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?
13 February 2023, 08:15
dpcd
Depends on how good you are with fiberglass.
I use a milling machine with ball end mills to do it.
13 February 2023, 18:21
Toomany Tools
I’ve used Gunline barrel channel scrapers and they work fine.


John Farner

If you haven't, please join the NRA!
13 February 2023, 20:55
M Pursell
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
13 February 2023, 21:13
Matt Norman
Thank you!
14 February 2023, 17:44
Jim Kobe
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

14 February 2023, 20:31
D Humbarger
A milling machine is THE method to use.
The channel can be dead on. I don't use
any other method.



Doug Humbarger
NRA Life member
Tonkin Gulf Yacht Club 72'73.
Yankee Station

Try to look unimportant. Your enemy might be low on ammo.
14 February 2023, 20:47
ramrod340
I do the first 90% with my duplicator then finish with the Gunline.


As usual just my $.02
Paul K
14 February 2023, 22:42
dpcd
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.
16 February 2023, 19:24
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.
21 February 2023, 03:49
MyNameIsEarl
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
21 February 2023, 17:14
JTEX
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.


tu2

I do a lot of flat tops. This is what I use!