Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

DPT Alpine


User Tag List

+ Reply to Thread
Results 1 to 12 of 12
Like Tree3Likes
  • 2 Post By gundoc
  • 1 Post By homebrew.357

Thread: Drilling out barrel with liner ?

  1. #1
    Member
    Join Date
    Dec 2014
    Location
    canterbury
    Posts
    1,891

    Drilling out barrel with liner ?

    Has anyone ever drilled out a barrel with a liner?

    I have a #3 weight original Winchester high wall barrel.
    Was .25 WCF and has a .22 liner in it that's totally buggered

    I want to still it out and re line in a low pressure bigger bore.
    But anticipate it being a bit of a challenge with the liner.
    Not sure if i should just drill with my .22 piloted 1/2" long drill
    Or try and drill out the liner only first
    Or make up a guide that screws on to the barrel threads and heat it all and try and drive out the liner with a punch in a hydraulic press

    Uncharted territory for me !

    Realistic ideas appreciated, on what might work or if you have ever done something like this ?

    Or maybe I'm over thinking it and the piloted drill will just do it all despite the liner ?

    Theres a slim chance one of you guys have done this before

    Cheers

  2. #2
    Pure-bred Mutt
    Join Date
    Sep 2019
    Location
    Tai Tokerau
    Posts
    3,454
    Haven't done it.
    Using a gundrill with through-bit coolant? I'd be inclined to have the barrel through headstock (chuck at each end, or chuck and steady at the outboard end)
    Mount your drill on your toolpost/cross slide

    Depending how much meat is where, if you could cut out the liner and be taking a decent bite on the original barrel I'd go for the one-shot.
    If not then I'd drill only the diameter of the existing liner, or *just* under, then go through again to final size.

    Depending how recently it was sleeved, if you're lucky could be loctite which would burn out, rather than sweat soldered in.

  3. #3
    Member
    Join Date
    Nov 2014
    Location
    Central Otago
    Posts
    1,295
    Just drill at a fairly low speed (100-200 rpm) with your piloted drill. If the liner come loose it will just push out ahead of the drill. Use plenty of cutting oil and withdraw the drill frequently to clear the swarf.
    northdude and Micky Duck like this.

  4. #4
    Member
    Join Date
    Dec 2014
    Location
    canterbury
    Posts
    1,891
    Quote Originally Posted by gundoc View Post
    Just drill at a fairly low speed (100-200 rpm) with your piloted drill. If the liner come loose it will just push out ahead of the drill. Use plenty of cutting oil and withdraw the drill frequently to clear the swarf.
    That's my preferred option.
    I think it will hear up and even if the liner starts moving it will still support the pilot and keep things mostly on track.
    I will still have to ream the new hole anyway and it will be a 1/2" drill so heaps bigger than the original .25 was drilled for the .22

  5. #5
    Member
    Join Date
    Jan 2016
    Location
    Omaru
    Posts
    451
    The 303 to 410 I did I started with a standard jobber bit, drilled as deep as I could then welded it to a smaller dia drill rod and did the rest. It ended up pretty true. Possibly not removing as much material or as deep as you though

  6. #6
    Member
    Join Date
    Jan 2016
    Location
    Omaru
    Posts
    451
    Have you got lines for other calibers?

  7. #7
    Member
    Join Date
    Dec 2011
    Location
    Taranaki
    Posts
    3,130
    If its a really old barrel liner job it is probably soldered or silver soldered in place so will be very well attached all the way along. The modern way is to use loctite or similar.

    I would bore the liner first , then bore again for the finished bore size.
    Be less impressed , and more involved.

  8. #8
    Member Cordite's Avatar
    Join Date
    May 2017
    Location
    NZ Mainland
    Posts
    4,633
    Quote Originally Posted by Chilli_Dog View Post
    Have you got lines for other calibers?
    Saw somewhere in the US they had barrel liners for 7.65 Luger which was basically .311" and Mosin/LE compatible twist rate. Many an old dog could potentially be given new useful life. I mean, how many sporterised rifles besides not being collectible are also nearly totally shot out...

    https://www.trackofthewolf.com/List/...1/LINER-30-LUG

    "Barrel liner for .30 Luger pistol, .303" bore, .311" groove, 1-10" twist, 4 grooves, 1/2" OD, price per inch, order the quantity in inches you require with a minumum of eight inches."

    But also sadly states:
    "Not for Export. Until recently, we supplied the best barrel liners to refresh the bores of antique rifles worldwide. Homeland Security now requires a expensive license, plus a additional permit (per order). Sorry, we can no longer afford to export barrel liners. We ship to any U.S. address!"

    Maybe @homebrew.357 can make pocket money from rifling chromoly tubing...
    "I find television very educating. Every time somebody turns on the set, I go into the other room and read a book." Groucho Marx

  9. #9
    Member
    Join Date
    Dec 2014
    Location
    canterbury
    Posts
    1,891
    Quote Originally Posted by Cordite View Post
    Maybe @homebrew.357 can make pocket money from rifling chromoly tubing...
    The chromoly liners go inside a larger holder and are button rifled.
    They need to be contained like that so the rifling is properly formed.

    I'm not sure if you can cut rifle a liner ? I guess you could place it inside a holder also but the cost of labour would kill it

  10. #10
    Member Cordite's Avatar
    Join Date
    May 2017
    Location
    NZ Mainland
    Posts
    4,633
    Quote Originally Posted by akaroa1 View Post
    The chromoly liners go inside a larger holder and are button rifled.
    They need to be contained like that so the rifling is properly formed.

    I'm not sure if you can cut rifle a liner ? I guess you could place it inside a holder also but the cost of labour would kill it
    I believe @homebrew.357 cuts his barrel rifling. Yep, just pocket money. The whole idea of re-lining a .303 is not really economical. You'd have to drill to insert the liner at least as far as the shoulder of the chamber and ream out the chamber end to accept the cartridge neck. So add a chamber reamer to the tool list. If someone imported a batch of liners, had the tooling and then relined a pile of cheap shot out LE Sporters to shoot straight it might be economical but still not that profitable given the basic cost of $150 per liner going by US prices.
    "I find television very educating. Every time somebody turns on the set, I go into the other room and read a book." Groucho Marx

  11. #11
    Member homebrew.357's Avatar
    Join Date
    Jul 2013
    Location
    Auckland
    Posts
    812
    Well a liner should be rifled already, just needs fitting in a sized bore for it. Now I had a rough 27" .45 barrel that was no good so I reamed it out with a .480" milling cutter that I fixed to my oil through reaming rod . Then a final ream to .500", cut rifled out to .510" with a twist of 1.24", still a few scratches to lap out, but will keep at it. I think I have found a way to stop the scratch marks, I tried the T/C cutter with a 5% back rack instead of forwarded rack, worked fantastic on 12/15 steel, just have to try 4140 to see how it goes.
    Micky Duck likes this.

  12. #12
    Member Cordite's Avatar
    Join Date
    May 2017
    Location
    NZ Mainland
    Posts
    4,633
    @akaroa1
    Good news, if you're looking to import your barrel liner from the US.

    https://www.nzhuntingandshooting.co....t-rules-57778/
    "I find television very educating. Every time somebody turns on the set, I go into the other room and read a book." Groucho Marx

 

 

Similar Threads

  1. WTB: Barrel liner drills and barrel re bore drills
    By akaroa1 in forum Buy, Sell or Swap
    Replies: 7
    Last Post: 29-09-2019, 11:54 AM
  2. Replies: 8
    Last Post: 10-07-2019, 12:03 AM
  3. Drilling stainless steel
    By akaroa1 in forum Off topic
    Replies: 12
    Last Post: 26-06-2017, 06:18 PM
  4. My Dream Drilling!
    By luv2safari in forum Firearms, Optics and Accessories
    Replies: 14
    Last Post: 20-02-2016, 08:01 PM
  5. Any Drilling Users?
    By luv2safari in forum Hunting
    Replies: 20
    Last Post: 09-12-2015, 08:34 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!