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300 Tejas

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Old 04-06-2010, 10:19 PM
Bronze Member
Join Date: Jan 2005
Location: Northern Utah
Posts: 66
300 Tejas

Can't seem to find much info on this round. Does anyone have any experience with it?

I believe it is a 300 RUM improved with a 50 degree shoulder.

Is it that much of an improvement over a 300 RUM?

How much more case capacity over a 300 RUM?

Is brass life better / worse?

Any info would be great.
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Old 04-07-2010, 07:28 AM
Gold Member
Join Date: Feb 2009
Location: Aberdeen, SD
Posts: 555
Re: 300 Tejas


There is a member here that I had the pleasure of hunting with last fall that I believe has a rifle in this caliber. The more I think about it - it may be a 338. Tejas. You can try shooting him a PM.

RMNS 8:28
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Old 04-07-2010, 10:20 PM
Bronze Member
Join Date: Sep 2008
Location: Colorado
Posts: 38
Re: 300 Tejas

The 300 Tejas is Brad Stairs round. His shop is Wasatch Precision Arms in Ogden Utah. I think he is one heck of a gunsmith. I have had three rifles built but not in the 300 Tejas. I do believe itís off a 300 RUM case. You can also go to Shooters Oasis.com under gunsmithing There is a comparison on the 300 Tejas.

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Old 04-08-2010, 08:39 PM
Platinum Member
Join Date: Dec 2008
Location: Great Falls, MT
Posts: 5,406
Re: 300 Tejas

Can't remember where I read it but I think .300 Tejas is like a .300 Weatherby improved. Or is it .300 RUM AI?

I voted for my "FREEDOM", "GUNS", and "MONEY" - keep the change - UNK.

"I am always proud of my country!"

"Leadership Rule #2: Don't be an @zzhole." - Maj Gen Burton Field.

Last edited by FEENIX; 04-08-2010 at 08:50 PM.
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Old 04-08-2010, 11:37 PM
Silver Member
Join Date: Aug 2008
Location: washington utah
Posts: 195
Re: 300 Tejas

I have a 375 tejas and it shoots a 300 grain bullet at 3200 fps with 111 grains of imr 7828ssc and 350 grain smk at 3000 fps with 108 grains of rl25 from a 31" brux barrel.
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Old 04-09-2010, 07:20 PM
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Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,835
Re: 300 Tejas

338 Bruce,

What is the parent case for your 375 Tejas. From your powder charge I would suspect its on the big Wby case or something similiar. Are those actual chronographed numbers or estimates?

Only reason I ask is because even the 378 Wby will fall WELL short of the velocity your reporting with max loads.

Just curious.
Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

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Old 04-09-2010, 07:21 PM
Platinum Member
Join Date: Dec 2001
Location: Potters Hill, NC
Posts: 1,542
Re: 300 Tejas

Wouldn't that be considered light artillery? JohnnyK.
"The pleasure you get from life is equal to the attitude you put into it."
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