Question for RUM owners

M

micus

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Hi there,

Just ordered a 300Rum after a ton of reading. I have come across a couple articles stating that accuracy will typically fall off around the 600rd mark, however, with proper maintenance, life can be extended to 900. I am curious as to what this maintenance is?? Heavy cleanings I assume and a ton of copper remover? I am just not sure what is meant by all this. I know it is imperative to never overheat a sporter barrel, especially on a hotrod caliber pushing 100+ grains of powder..

For break in, I typically I do the one shot, clean, one shot clean method for the first 10 rds of a barrels life, then progress to 3 shots clean and repeat for another 3 groups and call it done. From this point I will clean with Hoppes #9 maybe every 50 rds just to maintain some cleanliness in the bore.

SO what "special" maintenance does a guy need to do in order to get this extra 300 rds of barrel life out of one of these powder hogs??

thanks,

Mike.
 
Don't let the barrel heat up too much. That's about all you can do. If the bore copper fouls definitely remove it, but heavy cleaning won't extend barrel life.
 
cam1936 said:
Don't let the barrel heat up too much. That's about all you can do. If the bore copper fouls definitely remove it, but heavy cleaning won't extend barrel life.
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A shooting buddy has a 300 RUM with over 1100 round count and it's still making tiny groups.
Like everybody he believes in keeping it cool and usually takes four or five other rifles to the range with it.
 
i have a 7 rum and with loads over a 100 gns and speeds around 3400fps I don't expect great barrel life. I fire three slow shots at the range then rack it till the barrel is cool to the touch. I will be happy if I get close to a thousand round life..once i'm happy with two or three loads it will be an occasional shooter and a hunting rifle. I doubt I will ever need to change the barrel.
 
Mine crapped itself around the 600 mark. Reworking the loads and extending the col as far as the M75 Sako mag would allow got it back in the game for a bit longer, but the writing is on the wall. Sad thing is that it was built with a short throat to begin with. There's a bit of a paradox to a long range caliber that you can't keep a barrel on. If it isn't highly accurate, it's not a long range rifle. If you shoot it, the accuracy doesn't last, and if you don't shoot much you have no business hunting at long range. If you don't hunt at long range, there isn't much reason for having it on the first place. It's a bit of a catch 22. Next barrel will be a .300 Win again.
 
I have a 7 RUM that was a real pain to get an initial load for. Once I finally gave it a heavy cleaning and removed all the copper, I used some Ultra Boar Coat on it and the copper fouling is very minimal now.
Prior to the UBC, I found the rifle would foul really bad with on a few shots.
 
I have owned one 7mmRUM, and two 300RUM rifles. The 300s only had about 300 rounds through each, so I have no idea how long the accuracy would hold up, but they were easy to load for, and sub 1/2moa was easy with both rifles. The 7mmRUM had about 700 rounds through it, and it wasn't showing any loss in accuracy yet. Although the case is slightly smaller, I changed my first 7mmstw barrel out at around 1500 rounds. I first noticed the accuracy starting to degrade slightly at around 1200 rounds.
 
Rman said:
If you're only going through one, consider yourself lucky!
But yeah, it isn't the cheapest hobby around, is it?

R.
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At least normally it costs so much more to shoot out a barrel than to replace it that it doesn't seem to matter. With my RUM it was uncomfortably close to even up. All for a whole 150fps over a Win.
 
vancouverbc said:
A barrel a year isnt too terrible for a serious hobby I guess. If you want a real money pit for a hobby get a big boat ;)
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If it was just one for the fleet it would be nothing. If I were using a .300 RUM for a main rifle it would spend more time in the shop than at home. Which reminds me, I have to drop a couple more off at the gunsmiths.

My .338 Edge uses the RUM case as well, and despite having swallowed over 5, 500 boxes of 300 grain SMKs the throat hasn't budged. If my hasty math is correct, shooting it is considerably cheaper than the little .300 RUM. At least the barrel isn't costing more than the bullets are.
 
That's the thing, I like the rifle which is a Corlane build on a Sako 75. Its just that it comes with some real downsides for no real upside. I could live with the recoil, but find it viciously loud. I can live with the powder charges, but apparantly the barrels can't. Its an easy fix, the next barrel just won't be a RUM.
 
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