Page 1 of 2 12 LastLast
Results 1 to 15 of 16

Thread: Feeding Experiences For Shortmag Family?

  1. #1
    Join Date
    Feb 2003
    Posts
    180

    Feeding Experiences For Shortmag Family?

    I have a feeding problem in my 7shortmag
    My guess is that it is hitting the corner of the back end of the cahmber, right in front of the bolt nose.
    After the loaded round stops feeding, if I back the bolt up just a bit, I can feed the round the rest of the way in to the chamber.

    Has anyone else had this problem?

    I'm thinking of bevelling the back corner of the chamber just a bit, perhaps the same angle as the shortmag shoulder, then a good polishing.

    Your thoughts?

  2. #2
    Join Date
    Oct 2019
    Posts
    581
    get the feed/lips to feed shallower ?
    the chamber is a chamber, this is a feeding issue..mag.feedlips
    Last edited by rsmithsr; 12-13-2020 at 09:48 PM.

  3. #3
    Join Date
    Feb 2003
    Posts
    180
    Quote Originally Posted by rsmithsr View Post
    get the deed/lips to feed shallower ?
    the chamber is a chamber, this is a feeding issue..mag.feedlips
    No feed lips
    700 with BDL bottom metal

  4. #4
    Join Date
    Oct 2019
    Posts
    581
    [what holds the rounds below the bolt...
    those are feed lips

    QUOTE=Joe;840253]No feed lips
    700 with BDL bottom metal[/QUOTE]

  5. #5
    Join Date
    Dec 2003
    Location
    washington.........STATE that is.
    Posts
    11,169
    Quote Originally Posted by Joe View Post
    ...................
    I'm thinking of bevelling the back corner of the chamber just a bit, perhaps the same angle as the shortmag shoulder, then a good polishing.

    Your thoughts?
    puh-LEEEEZE NO!!!!!

    NO-NO-NO!!

    Please don't increase clearance anywhere in the chamber (unless you RELISH the idea'r of launching the floorplate and remaining rounds di'reckly into your testes at speed)

    OK..... that's a liddle over-the-top, especially considering the pre-64 M70, but still, decreasing web support in a high-pressure round like this can lead to blowouts and will definitely screw with your brass maintenance as you will be asking for bulges at the base.

    Senor' rsmithsr is correct..... this is specifically a feed lip problem. Rounds of this configuration clear back to and including the grandaddy Ackleys have always required the finesse of a skilled technician re feeding, especially when grinding action metal as opposed to bending flatstock ALA mag-fed......... and wallering out the bottom of the chamber doesn't address the actual problem

  6. #6
    Join Date
    Feb 2003
    Posts
    180
    Quote Originally Posted by alinwa View Post
    puh-LEEEEZE NO!!!!!

    NO-NO-NO!!

    Please don't increase clearance anywhere in the chamber (unless you RELISH the idea'r of launching the floorplate and remaining rounds di'reckly into your testes at speed)

    OK..... that's a liddle over-the-top, especially considering the pre-64 M70, but still, decreasing web support in a high-pressure round like this can lead to blowouts and will definitely screw with your brass maintenance as you will be asking for bulges at the base.

    Senor' rsmithsr is correct..... this is specifically a feed lip problem. Rounds of this configuration clear back to and including the grandaddy Ackleys have always required the finesse of a skilled technician re feeding, especially when grinding action metal as opposed to bending flatstock ALA mag-fed......... and wallering out the bottom of the chamber doesn't address the actual problem
    OK, relax, I hear ya. LOL!!
    Was not planning on wallering out the bottom of the chamber. But... I was planning on removing the barrel and cutting a slight 30 deg. bevel and polising it nice and smooth.

  7. #7
    Join Date
    Sep 2003
    Location
    Oriental, NC
    Posts
    1,000
    You're exposing more of the case web. At some point you will either rupture a case or develop a 30 degree belt on your case. On second thought you'll crack a sizing die trying to deal with the belt.

  8. #8
    Join Date
    Feb 2003
    Location
    Lower Dakota Territory
    Posts
    2,161
    Quote Originally Posted by Dave Tooley View Post
    You're exposing more of the case web. At some point you will either rupture a case or develop a 30 degree belt on your case. On second thought you'll crack a sizing die trying to deal with the belt.
    ^^^^^^^^^^^ This! -Al

  9. #9
    Join Date
    Oct 2019
    Posts
    581
    ...............
    so, just to be clear,
    you guys are saying this is a FEEDING issue,
    not a CHAMBER issue,
    right ?

    Quote Originally Posted by Al Nyhus View Post
    ^^^^^^^^^^^ This! -Al

  10. #10
    Join Date
    Jun 2007
    Location
    South Central WI
    Posts
    253
    Definitely a feed issue. As you slowly cycle a round, watch the pivot point where as the round starts to ‘tip up’ the loading ramp, the back of the case will start to drop as the round pivots off the front edge of the feed lip. If you relieve that lip to the rear that will allow the round to angle up more at that point of travel and will hopefully clear the edge of the chamber and feed. Take off a very little at a time, it may not take much, possibly just polishing the underside of the front edge of the feed lip .005 or so.

  11. #11
    Join Date
    Sep 2003
    Location
    Oriental, NC
    Posts
    1,000
    Short mags should only use center feed mag boxes. They are available from Kevin Wyatt.
    https://wyattsoutdoor.com/
    End of problems.

  12. #12
    Join Date
    Feb 2003
    Location
    Lower Dakota Territory
    Posts
    2,161
    All three of the short mag feeding problems I worked with were solved by the Wyatt center feed mags.

    They should have been center feed mags from the factory! -Al

  13. #13
    Join Date
    Feb 2003
    Posts
    180
    I have an extended mag box in the rifle from Kevin Wyatt and have it altered so I can get third round down

    Never heard of the center feed mag boxes.

    Will be looking at his website today

  14. #14
    Join Date
    Sep 2003
    Location
    Oriental, NC
    Posts
    1,000
    Quote Originally Posted by Joe View Post
    I have an extended mag box in the rifle from Kevin Wyatt and have it altered so I can get third round down

    Never heard of the center feed mag boxes.

    Will be looking at his website today
    You'll get two down and one up but it will feed great.
    I always considered the third shot as a signal for help.

  15. #15
    Join Date
    Feb 2003
    Location
    Lower Dakota Territory
    Posts
    2,161
    I believe the ones I used were the CFE-6 units. They were for a 300 WSM, a 300 'WWM' (Whitetail Whack Master...based on the 300 WSM case), a 7 WSM and a 7 SAUM. -Al

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •