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4000 fps in a 7mm STW w/140 Bullet?

 
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  #8  
Old 03-06-2013, 01:36 PM
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Re: 4000 fps in a 7mm STW w/140 Bullet?

stranger things have happened. But, I too would love to see him load up one of his rifles and fire that 140 grn over a chrono at 4000fps. Mind you I would be standing back at a safe distance with my first aid kit.
Now that I publicly put this in writeing I hope that no one gets hurt doing it.
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Old 03-06-2013, 02:49 PM
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Re: 4000 fps in a 7mm STW w/140 Bullet?

Find a new smith. I personally find guys like that to be untrustworthy and everything they do is questionable. The best smiths I have ever been around keep their mouth shut, their ears open, and never bag on a guy but rather gently educate him. Most good smiths let word of mouth run their business, not running of the mouth.
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Old 03-06-2013, 02:58 PM
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Re: 4000 fps in a 7mm STW w/140 Bullet?

Quote:
Originally Posted by BrentM View Post
Find a new smith. I personally find guys like that to be untrustworthy and everything they do is questionable. The best smiths I have ever been around keep their mouth shut, their ears open, and never bag on a guy but rather gently educate him. Most good smiths let word of mouth run their business, not running of the mouth.
I will second that one. Untrustworthy.
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  #11  
Old 03-06-2013, 05:49 PM
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Join Date: Dec 2006
Location: Alberta,Canada
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Re: 4000 fps in a 7mm STW w/140 Bullet?

i got there with a 100grn cup-core bullet with slippery stuff in the barrel and on the bullet ...
yes it was hot !! in a 26 inch pipe
now i shoot 180 bergers in it and am much more happy... lol
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  #12  
Old 03-06-2013, 06:17 PM
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Re: 4000 fps in a 7mm STW w/140 Bullet?

He's full of crap, you'd have to be running extreme pressures to get that out of a 7mm stw with a 140 gr bullet.

I had a 7mm stw with a 27" hart barrel. The fastest I ever chrono'd a 140 gr bullet out of it was 3610 and it gave a very hard bolt lift and a flattened primer which basically fell out of the case. I never tried that load again and backed down several grains after that experience. My hunting loads I ran a 140 gr partition at 3450 and considered that as max.

Anybody that claims 4000 fps with a 140 gr bullet out of a 7mm stw at any man-portable barrel length is a lying POS, a fool, or both.
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  #13  
Old 03-06-2013, 06:53 PM
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Re: 4000 fps in a 7mm STW w/140 Bullet?

I've seen 7stw's do an honest 3500 fps with a 140, and that was about it with slow burning powders. I was running my sendero with rl25 before data came out using the 140 accubond at 3500 fps. I was also doing load work-ups with my father's 7stw and hit 3500 fps with it using aa8700 and a mild overload. The caliber is really only good for 3400-3450 fps with a 140. That's plenty fast though.

The fastest I've ever pushed a 7mm was the 120 sierra in a 7rum with AA8700 under the hood. I was getting an honest 4000 fps with book loads. I was looking at a deer vaporizing load for it, but the rifle had a bad chamber and never shot well at all so it went to rifle heaven.
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  #14  
Old 03-06-2013, 07:49 PM
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Re: 4000 fps in a 7mm STW w/140 Bullet?

another major problem with driving most of the 7mm bullets that fast is that they'll probably explode after a couple inches of impact on something like a deer. Just not made for those kind of velocities
gary
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