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300 RUM to 338 Lapua Mag?

 
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  #1  
Old 11-07-2012, 01:18 PM
SMF SMF is offline
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300 RUM to 338 Lapua Mag?

I'm considering barreling my 300 RUM to .338 Lapua Mag. Is the felt recoil as manageable with a good break as the 300 RUM? I find the 300 RUM with a muzzle break comfortable to shoot however without the break it's just not something I want to shoot. Any thoughts on this would be great.

Thanks,

Steve
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Old 11-07-2012, 03:35 PM
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Re: 300 RUM to 338 Lapua Mag?

Recoil is more stout than the 300 RUM, especially with the 300 gr. bullets, but still very managable with a good brake.

You may run into some problems when rebarreling from the 300 RUM to the 338 Lapua. The Lapua requires a larger bolt face than either the 338 RUM or the 338 Edge. Many gunsmiths feel it leaves the rim too thin, creating some potential safety/liability issues. If you are set on one of the big 338's, then my first choice given your current setup would be the Edge or the RUM. All three of the big 338's mentioned above perform well, with litlle appreciable difference in ballistics. (Yes, there is some difference - bit not worth arguing about). Let us know what you decide.
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Old 11-07-2012, 10:18 PM
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Re: 300 RUM to 338 Lapua Mag?

Go 338 edge all the way......can even use the 300rum brass you already have. As good or better than the lapua...... Easier,cheaper and usually faster........ settle down lapua fans I got nothing against it if your starting from scratch....... With a good brake my 13.5 338edge with 300 grainers can be fired 100s of times consecutively without ANY discomfort, very slow push with no sharpness.
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Old 11-07-2012, 11:44 PM
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Re: 300 RUM to 338 Lapua Mag?

What action is your 3000 RUM built on? The only factory actions that can really handle the Lapua are the SAKO 95? (not sure what model, but i know its a sako) and the WBY Mark V. If your building on the M700 rem your best options are the EDGE or the RUM. I perfer the RUM, as it is a little cheaper (dies) and it saves you fireforming your brass. Both cartriges need a bit of work to make them feed the long bullets well, so thats a wash.
If your going to build on a M70 win I would go for the RUM because its a hair shorter. Any other action and I would probably go for the .340WBY or the .338 SIN.

Let us know some more details about the rifle too, ie. wieght, stock, barrel length, intended purpose.
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Old 11-08-2012, 10:01 AM
SMF SMF is offline
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Re: 300 RUM to 338 Lapua Mag?

Thank you gentlemen. It's actually a Remington 700 long action. The "Edge is intriguing, but I'm also looking for a longer barrel life and I'm told that the 338 Lapua Mag will give me twice the barrel life of the RUM. Is the "Edge" a barrel burner?

Thank you,

Steve
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  #6  
Old 11-08-2012, 11:51 AM
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Re: 300 RUM to 338 Lapua Mag?

Maybe someone will add to this, but I don't see any way that the Lapua is going to have twice the barrel life of the Edge, or RUM. You're shooting the same projectiles, assuming the 338RUM, at nearly the same velocities, and close to the same powder charges. If anything, the Lapua if overstuffed, will burn more powder, and likely have a shorter barrel life, but we're splitting hairs here. Sounds more like someone drinking koolaid that told you that,lol.
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Old 11-08-2012, 01:09 PM
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Re: 300 RUM to 338 Lapua Mag?

The only comparison i can make is, i was shooting 180s in my 338 rum and went to 250s. I did notice a significant increase in recoil. Not enough to say thats too much but i did notice it.
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