Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels & Ballistics

Rifles, Bullets, Barrels & Ballistics Applied Ballistics


Reply

338 RUM problems

 
LinkBack Thread Tools Display Modes
  #1  
Old 01-06-2008, 12:02 AM
Gold Member
 
Join Date: Jun 2004
Location: Worland, Wyoming
Posts: 582
338 RUM problems

Two years ago I started having problems with my factory barreled 338 RUM model 700. Accuracy went down the drain and I was getting very frustrated. I went to my local smith and he looked in the bore of my barrel and found a crack in one of the lands, there was also an area in the barrel that was holding some copper. He recommended replacing the barrel. I had him blueprint the action and install a Douglas premium 4160 cm barrel finished at 27 3/8 and added a muzzle brake.

Since the installation of this new barrel, I have fought this gun non stop. In the beginning, cleaning was a royal pain, as the barrel would copper foul very badly. I used the Tubbs final bore finish on the barrel and it seemed to help with the cleaning, but I still can't get the accuracy that I want. I have probably put over 250 rounds through this barrel trying to come up with a load that meets my needs, but I am still not happy. I have made several good kills on elk with the gun, one at 582 yards with 225 grain accubonds and the other at 539 with 250 grain partitions.

At this point, I have given up on the accubonds, the best group I can get is about 3 inches. Today I went out and shot 5 more loads and to say the least, I am not happy. The only bullets that seem to shoot out of this barrel right now are 250 gr partitions. 98 gr of H-1000 is producing about 2960 with standard deviation of around 15, 1.5 to 2" group. The other load that shows promise is 96 gr of reloader 25 in front of a 250 gr partition moly. This load had standard deviation in the single digits, but still only grouped at about 1.5" velocity was about 2930 average.

I have also shot some factory ammo through this barrel and it shoots about 2.5" at about 2800.

This rifle has a laminate stock that is bedded and floated, the scope is a sightron 4-16 (3rd sightron scope) with burris high rings and two piece bases.

The bullets the I shot today were shot with the bullets seated out to max length that would fit in the magazine, which is still about .090 off the lands. The OAL was 3.655. My prior loads actually shot better with the OAL at 3.580.

I had high hopes for sierra game king 250 bt behind 98 gr of H 1000, but these seemed to print to the same height, but strung out right to left about 4".

I am truly at wits end trying to make this gun shoot! When my original barrel was working right, 3" groups at 300 yards were the norm.

Is it possible to have a barrel that is this finicky with bullets or did I just get a poor barrel? The finish on the inside of the barrel looks excellent now and the throat shows no errosion.

Cases are all full length sized, primer pockets cleaned and cases trimmed.

I love the terminal performance of this cartridge, but I need better accuracy.
All opinions are welcome.
__________________
Remington model 700 300 RUM LH 26" rem ss/blued receiver lam stock 215 Berger @3025/180 NAB @3300
Remington model 700 338 RUM LH 27" Broughton 5C 225NAB@3300 /300gr Berger@2830
Savage LH 22-250
Reply With Quote
  #2  
Old 01-06-2008, 09:25 AM
Platinum Member
 
Join Date: Feb 2004
Location: Pennsyltucky
Posts: 2,625
you're correct, it is possible to get a bad shooting barrel. that happens once in a while. the only thing that caught my eye was when you stated the group was horizontal of 4" if that's not a wind thing ,then i would say you have receiver issues. i'm assuming you've eliminated the possibility of a bad scope and or mounting problems.that would have to be done before moving on to the gun. don't claim to be an expert, but at this point i would say the receiver wasn't trued, it was probably screwed. maybe one of our experts will chime in, i didn''t even sleep at a Holiday Inn last night!
__________________
davesonlinedeals.com
Reply With Quote
  #3  
Old 01-06-2008, 09:54 AM
Platinum Member
 
Join Date: Feb 2005
Location: USA
Posts: 2,598
Have you beded your scope bases to the action? If not try it and see if bedding them stops the horizontal stringing worked for me once..
__________________
range it,check the wind, dial in correction, aim and only one shot
Reply With Quote
  #4  
Old 01-06-2008, 10:34 AM
Gold Member
 
Join Date: Jun 2004
Location: Worland, Wyoming
Posts: 582
Of the loads I shot yesterday, only one load strung out, it was the sierra 250 game king bt. Both groups of nosler partitions shot actual groups, just not very tight, 2" to 3". I tried a load with 200 grain hornady's that grouped around 12" and it wasn't even close to being a hot load, only 3070fps. Today I will seat my bullets back to 3.580 and only shoot the nosler's. I have tried 3 different scopes and am on my second set of bases and rings on this gun. First set of bases and rings were dual dovetail leuopold because without the muzzle brake I kept shearing the ears off of the rear windage mount. With the dual dove tails on, it required moving the windage adjustment quite a bit off of center in the scope. After lengthly discussions with the owner of Sightron, he wanted me to use windage bases and zero the scope as close as possible to keep the cross hairs in the center.

As far as the action being true, my gunsmith is old school and very profficient. I forgot to mention that this barrel was turned to a #5 contour with an 11 degree crown. Right now I am super cleaning the barrel to make sure there is no copper fouling and I will shoot it again today.

What really frustrates me is that my original factory barrel shot great until the defects showed up. I recently had this same gunsmith install a take off 300RUM barrel on my old 338 win action and it shoots 1/2 moa all day and isn't picky at all.

I am really starting to think about a different barrel, maybe a Lilja ss.
__________________
Remington model 700 300 RUM LH 26" rem ss/blued receiver lam stock 215 Berger @3025/180 NAB @3300
Remington model 700 338 RUM LH 27" Broughton 5C 225NAB@3300 /300gr Berger@2830
Savage LH 22-250
Reply With Quote
  #5  
Old 01-06-2008, 01:50 PM
Platinum Member
 
Join Date: Feb 2004
Location: Pennsyltucky
Posts: 2,625
was this barrel a heavier contour and you had it turned down to a smaller contour? if that's the case, i'm bettin on the barrel being the problem.
__________________
davesonlinedeals.com
Reply With Quote
  #6  
Old 01-06-2008, 02:23 PM
Platinum Member
 
Join Date: Feb 2005
Location: USA
Posts: 2,598
I agree with Dave it is not advisable to contour a buttom barrel.
__________________
range it,check the wind, dial in correction, aim and only one shot
Reply With Quote
  #7  
Old 01-06-2008, 10:05 PM
Gold Member
 
Join Date: Jun 2004
Location: Worland, Wyoming
Posts: 582
Yes, the barrel came as a straight blank at full dimension. At the time, this gunsmith was contouring all of his own. Now he has determined that it is much easier and cheaper to order the barrel with the propper contour. I watched him contour this barrel, he kept his carbide sharp and took very small cuts with plenty of cooling fluid. The barrel never got hot while he was turning it.

Now on to the news of today. I super cleaned the barrel last night and again this morning. Got a lot of copper out of it, got it all out. Loaded up some more shells and went to the range.

I pushed the OAL back to where I had been shooting before 3.600. Loaded some 250 gr partitions with moly behind 97 gr of Rel 25, some more behind 98 gr of Rel 25, some uncoated partitions in front of 96 gr of Rel 25 and some sierra game king 250's in front of 96 gr of Rel 25. I also shot my hunting load from the last 2 years of 98 gr of H-1000 in front of uncoated partition 250 gr.

97 gr rel 25, 250 partition moly: 4 shots 3.5" 2960fps
98 gr rel 25, 250 partition moly: 5 shots 1.25" with one flyer 3010fps
96 gr rel 25, 250 partition uncoated: 5 shots just under an inch 3050fps
96 gr rel 25, 250 sierra game king: 8" or more horrible
98 gr H-1000 250 partition uncoated: about 1.5" three shots under an inch with two flyers 2955fps
This is a little bit more encouraging, but this barrel still won't shoot a boat tail bullet at all and I have no idea why.

I have several loads here that I should be able to improve on, as soon as my shoulder heals up.

So why won't this barrel shoot boat tails? How much free bore is a 338 rum supposed to have? I know mine has a lot and seems to shoot better with the bullets having a long jump. At least now I know I can get at least a reasonable group. This barrel is still copper fouling badly. But it will be very clean for the rest of the testing.
__________________
Remington model 700 300 RUM LH 26" rem ss/blued receiver lam stock 215 Berger @3025/180 NAB @3300
Remington model 700 338 RUM LH 27" Broughton 5C 225NAB@3300 /300gr Berger@2830
Savage LH 22-250
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 338 RUM problems
Thread Thread Starter Forum Replies Last Post
.338 win mag problems GermanXJ Rifles, Bullets, Barrels & Ballistics 8 01-16-2011 01:03 PM
Die Problems?? gunaddict62791 Reloading 3 01-07-2011 06:23 PM
Fn SPR mag problems Ian B Rifles, Bullets, Barrels & Ballistics 0 09-21-2010 12:51 AM
300 RUM problems asfornea2 Reloading 6 01-05-2009 11:01 AM
Bad problems poleok Member Introductions 0 09-16-2008 01:44 PM


All times are GMT -5. The time now is 10:00 PM.


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