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7mm Rem Mag Barrel Life

 
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  #1  
Old 08-10-2008, 01:08 PM
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7mm Rem Mag Barrel Life

In my part of the world barrel life is quite an issue due to legislation. Have just fitted a new Border (Scottish) barrel, shot count now about 250. I'm shooting mild loads, Sierra MK 175gr @ 2880 fps (28" barrel), absolutely no target shooting, just hunting, not more than three shots in quick succession, if at all.

We use a locally developed Powder, the same as your 4831SC, my load is 61,5 gr.

Can anyone give me a fairly accurate estimation of barrel life, from own experience etc.? I'm cleaning with JB & Kroil, occasional Robla Solo, only patches, no brushes, about every 40 shots.
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  #2  
Old 08-10-2008, 01:46 PM
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Re: 7mm Rem Mag Barrel Life

Easily over 1000.
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  #3  
Old 08-10-2008, 06:14 PM
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Re: 7mm Rem Mag Barrel Life

Different barrels firing differnt loads will vary in life. I burned out the throat of my 7mmRM, Ruger M77, 1988 vintage, chrome molly, after about a 1000 rounds. I shot a mixture of factory rounds and my own handloads. The handloads were on the *warm* side, but no bolt stiffness.

A pure guess on my part based on what you've said, you're probably good for 1500-2000 rounds...who knows???

If you don't mind me asking what are your *legislative issues*?
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  #4  
Old 08-10-2008, 06:39 PM
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Re: 7mm Rem Mag Barrel Life

I shot out a barrel in 7RM. It was a stainless factory barrel made in the sixties (one of the first Rem 700's built). I had more than 4000 rounds through it, but absolutely no rapid fire. I also had to keep seating the bullets out farther and farther. I used entirely flat base bullets (if that makes a difference). Accuracy was alway under 1MOA, until one day it went to about 5 MOA and nothing I could do with reloads would fix it.

It's only one data point, don't know how relevant it is to you. It might be the only 7RM that ever existed that got that much barrel life. I never used a brush on it (just solvent and patches).


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  #5  
Old 08-10-2008, 07:04 PM
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Re: 7mm Rem Mag Barrel Life

In my Hart barreled 7 STW I shot about 1,000 rnds before there was a noticeable drop in accuracy. The barrel was never shot hot and was cleaned regularly. However, I only shot heavy loads.

With the moderate power level ammo you mentioned and reasonable gun care you should get quite a bit more barrel life than I did.
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  #6  
Old 08-10-2008, 07:36 PM
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Re: 7mm Rem Mag Barrel Life

My 7mm Savage has well over 1500 rounds through it. I run it to about factory speeds, that is where the accuracy is. I have put strings through it that made the barrel untouchable at times. It was a true 1/4" 100yard factory rifle and now it will do 1/2" at best. When it gets to where it won't get under moa then I'll probably send it off to Kirby to set it back and the give it some more h*ll. The way you baby it you should get a lifetime of hunting out of it.
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  #7  
Old 08-11-2008, 09:43 AM
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Re: 7mm Rem Mag Barrel Life

Tx guys for all the advise so far, very informative indeed. I'm looking at minimum 2000 shots (accurate shots), hence my conservative approach.

Our legislation requires you to apply for a new license to replace a barrel (barrels are licensed, not actions like in the US), and you are limited to 4 licenses in total, therefore barrel life becomes a huge event!!
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