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What round to use 375RUM or 378Weatherby

 
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  #1  
Old 05-30-2006, 02:09 PM
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What round to use 375RUM or 378Weatherby

Trying to plan how to build my next gun. I know its going to be 375 cal. i know the 378 has better brass. but is there any draw back to this round. The action will be a bat repeater.
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Old 05-30-2006, 03:37 PM
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Re: What round to use 375RUM or 378Weatherby

I like the .375 RUM. A great performer.
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Old 05-30-2006, 03:53 PM
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Re: What round to use 375RUM or 378Weatherby

I would say the 375 RUM. Less hassle without the belt; not sure there is any game that can tell the difference between the two rounds.
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Old 05-30-2006, 04:11 PM
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Re: What round to use 375RUM or 378Weatherby

the weatherby will get you maybe 50-100 more feet of kick,i mean fps!
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Old 05-30-2006, 08:31 PM
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Re: What round to use 375RUM or 378Weatherby

I think ill do the RUM will i be able to get to about 3000fps with 300 gains in 28 inch barrel
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Old 05-30-2006, 09:16 PM
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Re: What round to use 375RUM or 378Weatherby

Probably not quite with the RUM cases but you will get close enough that you will never know the difference.

I have developed loads for several 26" barreled 375 RUMs that topped out at around 2900 fps with the 300 gr pill. These were what I would call max load levels in these rifles. If you get a custom chamber you may ba able to handle a bit more pressure but not a whole lot.

You will not see alot of velocity gain from 26" to 28" in the 375 caliber. Actually, I would guess less then 30 fps. I would personally opt for a shorter, stiffer barrel but it all depends on what type of rifle you are going to build.

In the field and at long range, you will be hard pressed to tell the difference between a 375 RUM and 378 Wby, except on the recoil end of things. Course if you have a brake on the rifle neither are hard to shoot.

The 375 bore makes the 338 bore look silly effiency wise. Do not think you need alot of barrel to get good FPS. You simply do not need alot of inches even with a 100 gr capacity in this bore diameter.

Kirby Allen(50)
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Old 05-31-2006, 01:42 AM
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Re: What round to use 375RUM or 378Weatherby

I never paid much of a thought to the 375 RUM as a long range rig. I ran some comperisonS against my 300 RUM using 210 Vergers, BC = 0.640 and for the 375 RUM 300 gr. Barnes triple shock because of its high BC of 0.555. I am impressed to say the least. I'm using 2850 MV for the 375 RUM as you can see below. Here are my findings.

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