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338 WinMag to 338 RUM?

 
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  #15  
Old 01-15-2013, 03:28 PM
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Re: 338 WinMag to 338 RUM?

Advantages will depend on bullet weight more than anything. If you want to run 225 or even 250 the 338win cartridge should serve you well but if you want to run heavier slugs the rum is the way to go. I have a 338 edge (almost the same as the rum) that started life as a 338 win, It fired 12 rounds as a 338win working up to the low 2400s with the 300berger gen1 before being re-chambered which jumped velocity in that same barrel up to about 2850fps. The load I settled on in that gun runs 2781fps with a 300smk. Hard hitting, long brass life and cheep for a cartridge of such capability. Based on that experience: I would expect you to gain 350-450 fps and maybe more as this was all done in a 24" barrel.
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  #16  
Old 01-15-2013, 05:30 PM
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Re: 338 WinMag to 338 RUM?

Quote:
Originally Posted by Sako7STW View Post
Woods,

Would you mind throwing a .340 Roy into your calculations there? Would be interested to see how it stacks up. I am really thinking on buying a .300 Roy in the Vanguard then retubeing it with a 28" stainless fluted in .340 Roy or .338 Tejas the next year when I have more funds again. My bro has a 300 WBY right now and has everything to load for it so the only thing I would be out is brass.
340 Wtby 225 gr bullets average max velocity - 2927 fps

338 win mag average 2787 fps
338 RUM average 3144 fps


The case length of the 340 at 2.825" is even longer than the 338 RUM and would further be restricted by mag length and is belted. Being belted is not a killer but the brass manufacturers typically put a lot of head clearance on belted cases between the new case shoulder and typical chamber shoulder.

IMO if I wanted to go for a 338 heavy hitter (and didn't have one) I would find a Winchester (3 position safety) rifle in 264 wm, 7 rm, 300 wm or 338 wm and rebarrel to a 338RUM and get a Wyatt's box. Or if I had an action that I could not get a Wyatt's box I would rebarrel to a 338/375Ruger (will fit easily in a 3.4" magazine)
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  #17  
Old 01-15-2013, 07:18 PM
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Re: 338 WinMag to 338 RUM?

Well I went to the local gun shop and he found 2 rem 700's xcrII in 338rum. So I am wondering if the RUM action will drop in any stock fitted for a model 700 LA? Like I said I want a Thumbhole stock.
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  #18  
Old 01-16-2013, 07:47 AM
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Re: 338 WinMag to 338 RUM?

Quote:
Originally Posted by Sako7STW View Post
Lefty, your not wasting your time bro. I have been reading and taking in all accounts and advice. The reason I hate, and my whole family hates the .338 Win is because for several years we hunted elk with guys that had them and they wounded and lost more elk than anyone we know. It was more the shooter yes, without a doubt. We came to the conclusion that due to the slower speeds and farther distances they were trying to shoot (keep in mind, this was 20 years ago and they were NOT LRH'ers), they kept hitting them low. One guy switched to a .300 WBY and never lost another critter. So it is like that hypothetical truck you had that was a total POS and you would never buy another one even though the newer trucks they make are leaps and bounds better and would probably never give ya a problem. I vowed I would never own a .300 Windbag or a .338 Windbag back then and never will, unless it is a donor of course ;) . Stupid I know but hey we all have our quarks.

Woods,

Would you mind throwing a .340 Roy into your calculations there? Would be interested to see how it stacks up. I am really thinking on buying a .300 Roy in the Vanguard then retubeing it with a 28" stainless fluted in .340 Roy or .338 Tejas the next year when I have more funds again. My bro has a 300 WBY right now and has everything to load for it so the only thing I would be out is brass.
Thank you for that Sako.
The win is more like the trajectory of an '06 than a 300 wsm or 7 rem, but that 'aint all bad. You have to learn your pipe, and all's well. With the limited boiler room the 338 win has, something like the 225 tipped bullets (the nos a'bond or hdy I-bond) offers about as much as you can get as far as output. You will often get the same bc as a lead tipped 250 in a rum and you are moving the same speed, so you are only at a 10% energy deficit the whole way out with the same trajectory. The win can only do 2400fps on a 300 grain, so I'd not go there. The rum's boiler room will help more on 300's and you MAY net the 300+ fps that was talked about.
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  #19  
Old 01-16-2013, 07:56 AM
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Re: 338 WinMag to 338 RUM?

Quote:
Originally Posted by Sako7STW View Post
Well I went to the local gun shop and he found 2 rem 700's xcrII in 338rum. So I am wondering if the RUM action will drop in any stock fitted for a model 700 LA? Like I said I want a Thumbhole stock.
The differences are inside, the rails and the relieved mag-well sides. As long as the stock is built well enough to take a bit of a beating recoil wise you are fine. Most laminates are good to start with; I took a m700 mountain laminate off of a 280 (I love free stocks that only need a bit of finish) and opened up the barrel channel enough to shove my lightweight 375 h@h in. It shot just fine until I needed a stock for my 7rem on an adl to bdl conversion.
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  #20  
Old 01-16-2013, 08:11 AM
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Re: 338 WinMag to 338 RUM?

you must be running into some geneticaly reengineered elk if your 7stw isnt killing them cleanly
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  #21  
Old 01-16-2013, 10:24 AM
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Re: 338 WinMag to 338 RUM?

Quote:
Originally Posted by lloydsmale View Post
you must be running into some geneticaly reengineered elk if your 7stw isnt killing them cleanly
+1 How big are those critters anyway???
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