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My New 7 STW

 
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  #1  
Old 03-25-2014, 10:17 AM
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Join Date: Mar 2009
Posts: 75
My New 7 STW

This is my first 7 stw build. Mark Phar of Tumbleweed rifles in Round Rock, TX put it together for me and I am very pleased with the fit and finish. Going to break the barrel in today after work. Hopefully it shoots as well as I am hoping it will.

The specs:
- Winchester 70 action w/ claw extractor made in U.S. blue printed, trued, and bedded, Squared bolt face
- Kreiger 5.5 barrel, 9" twist, at 28" long, fluted, threaded for suppressor that's on order
- Boyd's laminate stock

Any thoughts on loads? I'm planning on trying out some 140's and some 162's? Planning on sticking with retumbo or other hodgdon extreme powders bc of the temperature variability in TX, I have read that RL 25 works well.

My New 7 STW-20140324_223408.jpg

My New 7 STW-20140324_223424.jpg

My New 7 STW-20140324_223506.jpg
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  #2  
Old 03-25-2014, 10:58 AM
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Join Date: Feb 2012
Location: Ohio
Posts: 89
Re: My New 7 STW

jdwelch

Welcome to the club. That is a nice looking rifle that you have. I am a big Model 70 fan, and that with the stainless and laminated stock looks really nice. I bet that this thing will be a shooter once it is broken in and the load developed.

As for loads, what do you plan on hunting with it? I know that deer is big in Texas (so it Texas), but wondering if you might hunt something else too.

As for bullets, with your 1:9 barrel, you can try the Barnes LRX 168 gr bullets or any heavy for 7mm bullet. For lead free, the Barnes 150gr, 145gr LRX and Nosler E-Tip 150 gr bullets can work good. The Berger bullets are well liked too.

i do recomend a well constructed bullet, just in case you get a close shot. If its not, it can get very messy.
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  #3  
Old 03-25-2014, 11:04 AM
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Join Date: Mar 2009
Posts: 75
Re: My New 7 STW

The plan is shooting deer and maybe some pigs or whatever else I come across here in texas. If I ever go to shoot an elk or something like that somewhere else I will develop a different load and bullet more than likely.

I have had good luck with shock tips killing well in another rifle I have, so I have some 162 gr. sst that I was planning on using along with some 140 partitions and ballistic tips possibly.

What powders seem to be the most consistent over a range of temperatures? I under stand that none of them are going to be exact from summer to winter.
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  #4  
Old 03-25-2014, 11:21 AM
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Join Date: Jan 2013
Location: Maple Valley, Washington
Posts: 428
Re: My New 7 STW

Stay away from RL-25. I've seen swings in velocity equivalent to 3 grains of powder from a 30 degree temp change. RL-17 and RL-33 use different technology and do not seem to share the temp sensitivity of the other RL powders. Hodgdon's Extreme powders are good in temp extremes and so is Magnum.

The bullets you mentioned except for the partition will be pretty explosive at the velocities produced by the 7mm STW. I'd look more to the tougher bullets mentioned above such as any of the Barnes TTSXs or LRXs. I've found the 168 grainers don't stabilize in my 1 in 9 twist at sea level though they might be stable at higher altitude.
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  #5  
Old 03-25-2014, 11:24 AM
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Join Date: Mar 2009
Posts: 75
Re: My New 7 STW

Have you ever used any H870 or any of the very slow burning powders?
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  #6  
Old 03-25-2014, 11:36 AM
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Join Date: Oct 2008
Location: Alabama
Posts: 5,543
Re: My New 7 STW

Quote:
Originally Posted by Engineering101 View Post
Stay away from RL-25. I've seen swings in velocity equivalent to 3 grains of powder from a 30 degree temp change. RL-17 and RL-33 use different technology and do not seem to share the temp sensitivity of the other RL powders. Hodgdon's Extreme powders are good in temp extremes and so is Magnum.

The bullets you mentioned except for the partition will be pretty explosive at the velocities produced by the 7mm STW. I'd look more to the tougher bullets mentioned above such as any of the Barnes TTSXs or LRXs. I've found the 168 grainers don't stabilize in my 1 in 9 twist at sea level though they might be stable at higher altitude.
Are you kiddng me? I'm at 500ft above sea level and my 1:9.25" twist STW stabilizes 180 Bergers... Even my 9.5" twist 7mm RemMags will stabilize 168 Bergers perfectly.

I also use 7828 SSC powder, and have no issues with it during any south Alabama temp swings...Which can be 35+ degrees.
__________________
"I'm just a peckerwood who lives in the hills with too many guns..." - Bob Lee Swagger

"Give me a minute...I'm good. Give me an hour...I'm great. Give me 6 months...And I'm unbeatable." - Col. Hannibal Smith

Ignore everything I say, because I have a reading comprehension and memory problem...

Quote:
Originally Posted by WildRose View Post
The 284 is to the STW what a tricycle is to a Ninja.
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  #7  
Old 03-25-2014, 11:53 AM
Silver Member
 
Join Date: Jan 2013
Location: Maple Valley, Washington
Posts: 428
Re: My New 7 STW

MudRunner2005

My 9 twist has no problem with 180 Bergers (that is my go to load in that 7mm WSM) BUT the 168 gr LRXs put oblong holes in the paper. I have to jack them up to 3080 fps to get them to start to behave at 750 feet above sea level. This all from a 1 in 9 twist 4 groove Brux. To tell the truth, the 180 Bergers shoot so good I'd have a hard time using the LRXs even if they were stable - but it would be nice to have a tough bullet option.
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