close
Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Berger Bullets

Reply

300 RUM Load development*group pics added*

LinkBack Thread Tools Display Modes
  #1  
Unread 08-08-2011, 12:38 PM
Platinum Member
 
Join Date: Dec 2009
Location: Big Horn Basin, Wyoming
Posts: 4,320
300 RUM Load development*group pics added*

I recently got a 300 RUM and have started load development on it. I am using 200 Barnes LRX and Retumbo with Federal 215's I first planned on starting around 90 Gr. but after consulting my Barnes manual they had a much lower starting charge... in the 70's which I found to be ridiculous.. even their max charge seemed low but reluctantly I started within their parameters and have now worked from 87 grains up to 92. I wasnt seeing much velocity increase till I got to about 89 grains, before that it was stuck at about 2950ish. and grouping seemed sub par. at 90.5 I started hitting the low 3100's and it has kind of plateaued but my groups are shrinking dramatically. I am monitoring pressure signs, the bolt lift is getting slightly stiffer but not bad I expect to find max pressure within a grain or so Then I will try it out for a while reloading the same few pieces of brass over and over to see what kind of life I can expect out of my brass. I may have to adjust it if it wears brass out too fast. I have a new box of Nosler brass sitting here and I hear its softer than other brass so I want to be sure I dont wear it out right away. I will keep you guys posted and maybe be able to come up with some useful load data for someone wanting to use 200 LRX with retumbo.
__________________
Mike


" Real elk guns start with the number 3 or bigger and blow two holes, one in and one out." - My Dad

Last edited by Tikkamike; 08-09-2011 at 08:16 AM.
Reply With Quote
  •   #2  
    Unread 08-08-2011, 01:15 PM
    Gold Member
     
    Join Date: Mar 2008
    Posts: 578
    Re: 300 RUM Load development

    Mike,

    I just finished doing load development for a friend that has the same gun you just purchased. we are using different componets, but i just thought i would share one thing.

    after messing around with oal, and powder increments for a couple of weeks, it was a very consisent .7 to .9 gun. i finally changed the torque in the action screws to 40 in/lb and the groups shrunk drastically. since then it has consistently shot groups in the .4 to .5.

    this gun is free floatet ,but not bedded.
    Reply With Quote

      #3  
    Unread 08-08-2011, 01:18 PM
    Platinum Member
     
    Join Date: Dec 2009
    Location: Big Horn Basin, Wyoming
    Posts: 4,320
    Re: 300 RUM Load development

    Thanks for the tip. I floated mine this weekend and plan to bed it after I have my load done and see what it does to group size.
    __________________
    Mike


    " Real elk guns start with the number 3 or bigger and blow two holes, one in and one out." - My Dad
    Reply With Quote
      #4  
    Unread 08-08-2011, 01:24 PM
    Gold Member
     
    Join Date: Mar 2008
    Posts: 578
    Re: 300 RUM Load development

    I will be anxious to know how it turns out. He is considering bedding his, but its shooting great now, so not sure he will. I am curious to see if his point of impact changes after he takes the stock of and puts it back on. i think this is where the bedding will help.
    Reply With Quote
      #5  
    Unread 08-08-2011, 01:26 PM
    Platinum Member
     
    Join Date: Dec 2009
    Location: Big Horn Basin, Wyoming
    Posts: 4,320
    Re: 300 RUM Load development

    it will more than likely change unless he just gets lucky. I have only ever had one rifle that i could take out of the stock then replace it and not have to re zero my rifle
    __________________
    Mike


    " Real elk guns start with the number 3 or bigger and blow two holes, one in and one out." - My Dad
    Reply With Quote
      #6  
    Unread 08-08-2011, 01:28 PM
    Gold Member
     
    Join Date: Mar 2008
    Posts: 578
    Re: 300 RUM Load development

    I have had similar experiences. if it were mine I would bed it.
    Reply With Quote
      #7  
    Unread 08-08-2011, 02:47 PM
    Gold Member
     
    Join Date: Jun 2010
    Location: Bakersfield, Ca
    Posts: 554
    Re: 300 RUM Load development

    I have pressure tested these3 in my 300rum and found the max to be around 92gr of Retumbo, which is giving me 3085fps with an ES of 19fps. I havn't put these on paper yet, but from the consistency i'm getting it should be fairly accurate. I had some loads at the range with me yesterday to try out, but by the time i finished messing with my 300wsm, my shoulder was done in.
    __________________
    "I'm interested in rifles, but only accurate rifles are interesting". Col. Townsend Whelen
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: 300 RUM Load development*group pics added*
    Thread Thread Starter Forum Replies Last Post
    Kirby Allen’s “no load development” load development method. WildcatB Reloading 70 09-24-2012 06:01 PM
    6.5 wssm-Pics added, Reduced, Rilfe and 565yd Group RockZ Guns For Sale 11 09-01-2011 07:45 PM
    Remington SPS .270 (pics added) texan79 Guns For Sale 2 06-05-2011 11:35 AM
    Load Development Done, my best 300 yard group ever! Troutslayer2 Long Range Hunting & Shooting 14 10-15-2010 09:52 PM
    Sendero SF 300 rum///PICS ADDED .SPF Strick9 Guns For Sale 5 05-31-2008 04:47 PM


    All times are GMT -5. The time now is 05:23 AM.


    Powered by vBulletin ©2000 - 2016, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC