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Barrel life on 338 RUM

 
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  #8  
Old 08-31-2004, 08:03 AM
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Re: Barrel life on 338 RUM

D.Camilleri,

The Rum cases like any case with a 90-100 gr capacity are hard on throats, no way around that.

The reason most throats go bad is because the shooters tend to let their barrels heat up during load testing or actually do to much load developement with these big rounds.

I tell my customers that with rounds like this, they need to do their research before they get to the range.

Trying every load that comes down the pike will result in very short barrel life. Shooters should use proven bullets that are know to be consistantly accurate over a wide array of guns such as teh Ballsitic Tips for deer hunting or the Partition bullets for serious critters.

Tweaking a load is fine but if you put 400 rounds down your barrel playing with seating depth and powder charge weight you will eat your barrel up very quickly.

Many will hammer me for this but I recommend that when someone is beginning load developement with these type of rounds, only load two loads of each load to accuracy test and velocity test.

Most "experts" will tell you this will tell you nothing of the quality of the load, I disagree, I feel it will tell just enough so that you can either proceed with more testing or move on to another load.

I also recommend testing these loads at a range of at least 200 yards and 300 yards is much better yet. Why?

Well the farther you shoot the more deviation you will see in each load. At 100 yards youcan take three test loads and they could group all between 3/4 and 1 moa. Step back to 300 yards and you notice that the consistant loads will be dramatically better then the other loads, even with two rounds.

Still most "experts" will say this is not good enough to get a good evaluation of a load.

I agree. After you test ten or so different loads using 2 rounds of each, generlly at least 2 of these will stand out from the rest.

I would take these two loads and load up 9 to 12 of each. Again at a range of at least 200 yards and again 300 would be better, shoot three or four 3 shot groups and average their group size along with the velocity reading you get from all the rounds.

At least one of those will generally produce quality consistancy and accuracy and you only have 30-40 rounds down your barrel.

Again most "experts" will say anything less then a 5 shot group is a waste of time when developing loads.

I agree that with conventional rounds what are used for extreme accuracy work, this is true, 10 shot groups are even better but they serve no purpose when dealing with these large cases in factory barrels.

These rounds produce far to much barrel heat and powder fouling to produce useful 10 shot groups and it take so long to let the barrel cool with a 5 shot string that you will be sitting much more then learning.

In a sporter weight rifle chambered for the RUM rounds, after the third shot, the barrel is to hot to hold with a bare hand. THis means that the third shot is going down a bore that is very hot and throat erosion will start to be a problem even at this level.

If you shoot another two rounds you will certainly burn your barrel out in 300-500 rounds.

If your willing to give your barrel 20 minutes between shots to cool properly depending on the air temp and sun intensity, by all means use 5 shot groups.

I use this testing technique on all of my big cased rounds and they all end up shooting extremely well and barrel life is up in the +1000 rounds at least, even woth rounds like the 257 STW.

I have been seeing more and more problems with Rem barrels of late, just poor quality control. Thats what you get when you pay high school drop outs to run the machines, there is no pride left anymore.

Still, the Rem 700 is still in my opinion the finest factory action to built extreme accuracy rifles on.

If you send back a barrel that has a physical flaw in the rifling, I would hope they warrantee it but they will demand the complete rifle returned if they do anything for you.

I am located about 15 miles west of Great Falls. Which is around 4 hours north west of Billings.

Have your friend give me a call and we can talk about his 300 RUM project.

Here is my information:

Allen Precision Shooting
(406) 264-5168

Good Shooting!!!

Kirby Allen(50)
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Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
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  #9  
Old 09-02-2004, 10:45 PM
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Join Date: Jun 2004
Location: Worland, Wyoming
Posts: 551
Re: Barrel life on 338 RUM

Well, my new douglas premium barrel, 4160 chrome moly,kryoed, is on the lathe getting the contour cut. We will be keeping a min. .700 and leaving it max length around 27 inches. Hope to be breaking in the barrel this weekend. [img]images/icons/grin.gif[/img] [img]images/icons/grin.gif[/img]
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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
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  #10  
Old 10-31-2004, 11:45 PM
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Location: Worland, Wyoming
Posts: 551
Re: Barrel life on 338 RUM

New barrel is on and also a new scope(sightron 6-24) and a muzzle brake. My 210 grain barnes xlc bullets won't group. They are stringing left to right. Due to lack of time and patience, I loaded some hornady 225's in front of 92 gr. of rel 22 and they are shooting ok. Dropped two elk in 2 shots. Second bull was at 434 yrds. Need a little more time for load development. Might have to try some different powders. Have put quite a few rounds through and am still not real happy. Had a few problems, first the contoured muzzle brake sheared off while antelope hunting. Too thin. Next the scope kept slipping in the rings. Next couldn't get repeatability with the scope. Sightron had me a new scope in under a week. This heavy #5 contour is heavy to pack all day in elk country, but exercise it good right. [img]images/icons/rolleyes.gif[/img]
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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
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  #11  
Old 11-03-2004, 04:52 PM
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Join Date: Aug 2001
Location: Del Rio TX
Posts: 38
Re: Barrel life on 338 RUM

<BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>My local gunsmith says he is rebarreling 300 rum's on a constant basis because guys are severely shooting out the throats in 300 to 400 rounds. <HR></BLOCKQUOTE>

That is a very low round count.
The only 300 RUM I built that has gotten shot out so far did it at 3450 rounds of hot handlaods. That was when the customer could no longer hold 3/4" at 100 with her by seating the bullet out a bit or anything else he did with loads.

This was with a Walther barrel, which do last a very long time.

FWIW
Celt

[ 11-03-2004: Message edited by: Celt ]
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  #12  
Old 11-03-2004, 09:08 PM
 
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Re: Barrel life on 338 RUM

<BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>.i was told this by bob hart a top builder in accuracy rifles.if you need a new barrel you should talk to him .the price is great the work is even better www.rwhart.com <HR></BLOCKQUOTE>With a statement like that it is clear to me you never had a good gunsmith work on one of your guns.The first and only 300 Ultra Bob Hart ever rebarreled for me was shot out when I got it.He charged me 600.00 for a rebarrel job with a used barrel.He has done it to other BIG NAME people also.He has VERY FEW return customers.Watch yourself.....Back to the Ultra.....My last 3 300 Ultra barrels starting going at about 1500 rounds.I would expect the 338 to go to at least 2000 or 2500..

[ 11-03-2004: Message edited by: The Long 1 ]
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  #13  
Old 10-15-2010, 10:48 PM
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Join Date: Dec 2001
Location: bluefield,va,us
Posts: 332
Re: Barrel life on 338 RUM

Thats real funny
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