Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

300 RUM Case shortening

 
LinkBack Thread Tools Display Modes
  #1  
Old 10-20-2006, 09:57 AM
Silver Member
 
Join Date: Aug 2005
Location: White City, Saskatchewan
Posts: 218
300 RUM Case shortening

How hard would it be to shorten the 300RUM case .250"? I am thinking of rechambering a 300 win mag to a shortened version of the 300RUM if forming the case would not be to difficult. I want more power than the 300 win mag but less than the 300RUM. I know the Dakota fits in there but the brass availability is my concern. Does anyone here load their 300 RUM down. If so what powder are you using and what is the load density like.
Reply With Quote
  #2  
Old 10-20-2006, 10:59 AM
Gold Member
 
Join Date: Nov 2004
Posts: 878
Re: 300 RUM Case shortening

Id look at the 338RUM first and see if it fits the bill. AIf that won't do what you want, pick your favorite die mfg, and talk to them about a forming die.

One other option would be the various 30 caliber cartridges on the full length 375H&H case. 300Wby, 30-8mmremmag, 308 Bear, 300Ackley and all the likes of those.
Reply With Quote
  #3  
Old 10-21-2006, 07:06 AM
Silver Member
 
Join Date: Jun 2006
Posts: 163
Re: 300 RUM Case shortening

if u dont mind telling.... how come u dont want the 300rum? wouldnt that just be the easiest?
Reply With Quote
  #4  
Old 10-21-2006, 09:52 AM
Silver Member
 
Join Date: Aug 2005
Location: White City, Saskatchewan
Posts: 218
Re: 300 RUM Case shortening

I just don't think you are getting enough of a gain shooting 20gn more powder in the 300 RUM over the 300wm. I just think that a RUM case that is shortened to hold the same amount of powder as the 300wm would be more efficient. It would be like the 300wsm but improved.
Reply With Quote
  #5  
Old 10-21-2006, 09:59 AM
Platinum Member
 
Join Date: Jan 2004
Location: Blackfoot, Idaho
Posts: 8,090
Re: 300 RUM Case shortening

I recently resized 7mmRUM to 338RUM. Necks did good. Shoulders didn't. Dimpled every one of them. Still noticeable after shooting but they shoot ok.

Annealing didn't help.....
__________________
I may be the slowest guy on the mountain . . . . but . . . . I'm on the mountain!
Reply With Quote
  #6  
Old 10-21-2006, 10:32 AM
Platinum Member
 
Join Date: Apr 2003
Location: North Bend, Oregon
Posts: 1,212
Re: 300 RUM Case shortening

[ QUOTE ]
I just don't think you are getting enough of a gain shooting 20gn more powder in the 300 RUM over the 300wm. I just think that a RUM case that is shortened to hold the same amount of powder as the 300wm would be more efficient. It would be like the 300wsm but improved.

[/ QUOTE ]

The gain in speed in any sport at the upper ends is never linear. Doesn't seem right a 200 horse boat will run 65 mph and the same hull need over 600 horses to go 100 mph. (not exact figures)

What is 20 grains? 25 less loads out of a can of powder. I can afford that.

I have found the most efficient means of picking up performance is to just put a longer barrel on it.

A 300Wby sounds like exactly what you are looking for. Mine will do 200 grain Accubonds at 3100 comfortably with only 83 grains of IMR-7828SSC in a 26" barrel.
__________________
Build a man a fire and you heat him for a day.
Set him on fire and you heat him for life.

Only accurate rifles are interesting.

Gordy and Brady.
Reply With Quote
  #7  
Old 10-21-2006, 11:34 AM
Bug Bug is offline
Bronze Member
 
Join Date: Mar 2004
Location: Deep East Texas
Posts: 34
Re: 300 RUM Case shortening

Fwiw,
The idea, as you presented it, would be very simple to accomplish. One could simply cut .250" off the bottom of the sizing & seater dies. After resizing, trim the extra-long case neck back to original length. It will most likely require turning case necks - they'll be too thick. Then make up a dummy round. Have your 'smith chamber your rifle using your dummy round as a "Go" headspace guage. Should he go a smidge too deep, you can always back off on the die. You will probably have to do a little work on the feed rails, as the UM case is considerably wider. It won't be any sort of a big chore,though. If it's really what you want, then go for it. You'll likely have the only one around. [img]/ubbthreads/images/graemlins/grin.gif[/img]
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 300 RUM Case shortening
Thread Thread Starter Forum Replies Last Post
shortening a 300 wm barrel from 24 to 26 gspman Gunsmithing 9 11-03-2010 01:51 PM
Shortening cases? arthurj Reloading 0 12-28-2009 12:00 PM
Shortening a barrel ? tjaketerry Rifles, Bullets, Barrels and Ballistics 2 12-27-2009 08:53 PM
Shortening scope base screw HTG Long Range Scopes and Other Optics 5 09-04-2009 10:19 PM
Need some very quick help on shortening case bodies scottl0000@hotmail.com Rifles, Bullets, Barrels and Ballistics 10 05-22-2008 06:01 PM

Current Poll
Do you archery hunt for elk?
YES - 31.35%
58 Votes
NO - 52.97%
98 Votes
Not yet, but I plan to. - 15.68%
29 Votes
Total Votes: 185
You may not vote on this poll.

All times are GMT -5. The time now is 03:02 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC