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.375 RUM Wisdom

 
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  #8  
Old 02-13-2011, 04:21 PM
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Re: .375 RUM Wisdom

There is more room with a bigger bore for that powder to be burnt up in a shorter amount of time. Most poeple will tell you there is not much gain past 30 in in an 338 edge there for the 375 barrel would be shorter. You might gain a few fps past 28 but I dont think you will gain much past 28in in that round. Just my thoughts.

Last edited by Booney; 02-13-2011 at 04:25 PM.
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  #9  
Old 02-13-2011, 05:15 PM
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Re: .375 RUM Wisdom

do a search for tejas
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  #10  
Old 02-16-2011, 12:47 PM
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Re: .375 RUM Wisdom

I wanted to rebarrel my .375 to a 27-28" tube install a brake and hope to get 2700fps with the 350smk. Im stuck on the EDGE right now and hope to get my 375 going.

I haven't found any useful data on a 375 ultra mag with 350gr smk. None,no tests or chrono's no powder data,nothing. kinda don't know where to start.

Retumbo,RL25?

It would be nice to see a repeater 375RUM and 350smks do 2750fps. The reason why a repeater is i'd like to seat the bullet short enough to fit in a magazine. Even if its a wyatts or seekins,i'd love to make a repeater.
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  #11  
Old 02-16-2011, 07:43 PM
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Re: .375 RUM Wisdom

rl 25 is a little too slow, I have rl 22 to try and have used rl 19 and 7828 with the 300 gn bullets.
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  #12  
Old 02-17-2011, 09:19 AM
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Re: .375 RUM Wisdom

This is a caliber that one must shoot to appreciate! I have a tube for this caliber for my switch barel rifle and let me tell you it is flat shooting and very accurate ! Have not been able to work up some loads but shooting factory 300grn. Swift bullets it will put 4 in .5 or less . You do however know you are shooting a power house but recoil is very manageable if you are used to it?
Good luck in your build .

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  #13  
Old 02-17-2011, 01:57 PM
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Re: .375 RUM Wisdom

Hicks, I think it is a good option because of all the new high bc 375 bullets coming out. My 378 wby now is a monster at long range. If we had these kind of bullets available 30 years ago me and probably many more would have shot the 378 and not wildcatted the 338-378. The barrel life is quite a bit better with the 375 plus you can shoot a slower twist which gives you a slight advantage in extreme range shooting.

When I did all the work on wildcatting the 300 RUM in the late 90's I did from 7mm through 358. The 338-300 was the best at long range on big game animals at the time. I didn't do the 375 because the bullets were not available at the time for the cartridge to make sense long range. With bullets available now and knowing what I know about the RUM case I would do it in two calibers and those are 338 and 375. As I went from 7mm-358 the best loads used faster powders as the caliber increased. So with the 375 look for it to shoot better with faster powders. I think the 375 is going to look better and better as bullets get better with better availability.
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  #14  
Old 02-21-2011, 06:41 PM
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Re: .375 RUM Wisdom

Quote:
Originally Posted by Long Time Long Ranger View Post
Hicks, I think it is a good option because of all the new high bc 375 bullets coming out. My 378 wby now is a monster at long range. If we had these kind of bullets available 30 years ago me and probably many more would have shot the 378 and not wildcatted the 338-378. The barrel life is quite a bit better with the 375 plus you can shoot a slower twist which gives you a slight advantage in extreme range shooting.

When I did all the work on wildcatting the 300 RUM in the late 90's I did from 7mm through 358. The 338-300 was the best at long range on big game animals at the time. I didn't do the 375 because the bullets were not available at the time for the cartridge to make sense long range. With bullets available now and knowing what I know about the RUM case I would do it in two calibers and those are 338 and 375. As I went from 7mm-358 the best loads used faster powders as the caliber increased. So with the 375 look for it to shoot better with faster powders. I think the 375 is going to look better and better as bullets get better with better availability.
You seem to know your stuff. What would be the optimum bbl length and twist rate if I'm going to stick to 350gr bullets? I'm thinking about having Hart to the bbl and square up the action. Lead time is horrendous though.

Hicks
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