Results 1 to 11 of 11

Thread: 350 Rem Mag outstanding with 60.5grs IMR4320

  1. #1

    Default 350 Rem Mag outstanding with 60.5grs IMR4320

    The Mod 7 350 Rem Mag out did itself today with the increased load of 60.5grs IMR4320. Great velocities and good accuracy.

    The Mod 7 and Weaver V 1-3x20mm

    Average of three rounds


    Extreme spread


    Standard deviation


    Group size

    __________________
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  2. #2
    Member alaska bush man's Avatar
    Join Date
    Apr 2006
    Location
    Alaska
    Posts
    905

    Thumbs up Load

    Always had good luck with RL 15 in the 350 Mag and 35 Whel.

    The 225gr TSX should serve you well in Alaska.

  3. #3
    Member Float Pilot's Avatar
    Join Date
    Oct 2006
    Location
    Kachemak Bay Alaska
    Posts
    4,217

    Default

    OK, a couple of questions.

    1. What was the COL?
    2. What was the primer?
    3. Crimp or no crimp?
    4. Full length resized brass or neck sized.

    I have some that I only neck sized just to see how they do against the factory new brass.


    I have a couple loaded with RL-15 for this weekend.
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
    http://site.dragonflyaero.com

  4. #4

    Default

    Quote Originally Posted by Float Pilot View Post
    OK, a couple of questions.

    1. What was the COL?
    2. What was the primer?
    3. Crimp or no crimp?
    4. Full length resized brass or neck sized.

    I have some that I only neck sized just to see how they do against the factory new brass.


    I have a couple loaded with RL-15 for this weekend.
    COL 2.875"
    CCI 250
    No crimp
    Full length resized Rem. brass (Any rifle I hunt with I full length resize).
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  5. #5
    Member alaska bush man's Avatar
    Join Date
    Apr 2006
    Location
    Alaska
    Posts
    905

    Thumbs up Pet Load 350

    Pet Load in my Rem 600 18.5" Barrel

    59.5/ReL15
    250 Hornady RN
    2.820" COAL just fits 600 magazine
    2479,2461,2498fps
    WLRM,
    -pressures OK
    -feeds very well

    60/ReL15
    250 Speer Hot Core
    2.815"
    est. 2500MV
    WLRM,
    - accurate
    - 3 shots into 1" at 100yds
    - 3 shots into 3" at 200yds
    - good load for all my 350RMs
    - this 600 is scope sighted (1..5x 5 Leupold) in for this load
    -No crimp

  6. #6
    Member Float Pilot's Avatar
    Join Date
    Oct 2006
    Location
    Kachemak Bay Alaska
    Posts
    4,217

    Default

    I have been using a light roll crimp because the rounds in the magazine were getting pounded around pretty good by the recoil. I will try no crimp to see what happens with accuracy.

    I found another guy using Beartooth's load of IMR 4320, but he was obtaining almost 100 fps less.
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
    http://site.dragonflyaero.com

  7. #7

    Default

    That is interesting that he is getting 100fps slower. I shot 60grs of WW748 load again and got 2624fps on the average and that is only 2fps slower than the last time I shot that same load so my chorny is correct. Also the above load of 60.5grs is just a little faster than my 60.3gr of IMR4320. Also my 257-300Wby I shot today and is getting the same as the last time I shot 86grs Retumbo so my chrony is correct, it better be it is brand new.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  8. #8
    Member Float Pilot's Avatar
    Join Date
    Oct 2006
    Location
    Kachemak Bay Alaska
    Posts
    4,217

    Default

    HE was using a Ruger so it could have been the chamber and barrel dimensions.
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
    http://site.dragonflyaero.com

  9. #9

    Default

    Quote Originally Posted by Float Pilot View Post
    HE was using a Ruger so it could have been the chamber and barrel dimensions.
    Good luck on getting your 350 Rem mag shooting like you want I really hope it all settles down for you and you find what you want in good results.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  10. #10
    Member IceKing02's Avatar
    Join Date
    Jun 2006
    Location
    Eagle River
    Posts
    552

    Default Beartooth...

    Why no crimp on these rounds? Are they strictly for the bench? I've been crimping all of my .257 Wby reloads anticipating the needs due to recoil in the mag...

    TIA (thanks in advance, not transient ischemic attack)

  11. #11

    Default

    Quote Originally Posted by IceKing02 View Post
    Why no crimp on these rounds? Are they strictly for the bench? I've been crimping all of my .257 Wby reloads anticipating the needs due to recoil in the mag...

    TIA (thanks in advance, not transient ischemic attack)
    Never have liked crimping my rounds if there was not a clear need for the crimp. I have not experienced any evidence with my 350 Rem Mag that it needs it and I fill the magazine full at the range when testing loads and recoil has not presented a problem with my rounds.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

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
  •