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.270 win?

 
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  #1  
Old 06-21-2012, 02:04 PM
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Join Date: May 2011
Location: michigan
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.270 win?

Why dont store bought rounds have full powder loads? I guess max pressure bla bla. I shake a 270 win. round and it sounds like a ech-a-skech. So why a wsm when 'just add more powder' to a 270 win.? long action vs short action difference is a joke to keep people talking. So any intelligent input?
Just wondering?
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  #2  
Old 06-21-2012, 02:51 PM
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Re: .270 win?

Some powders reach max pressure long before the case is full.

Other powders will completely fill the case long before reaching max pressure.

Factory ammo must be safe in all factory rifles.

-- richard
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  #3  
Old 06-21-2012, 02:55 PM
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Re: .270 win?

Wsm brass is also rated for higher pressure I believe in the 62k psi range as opposed to the old win case rating of 50k psi. Higher pressure higher speed.
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  #4  
Old 06-21-2012, 04:10 PM
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Re: .270 win?

I load several 270 Wins and 270 WSMs and built alike and loaded with the same bullets and performing top notch the WSM will out run the Win by around 200fps.
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  #5  
Old 06-21-2012, 05:58 PM
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Re: .270 win?

So the rifles arnt built to handle higher pressures i get it.
So they could build 270 win. rifles to handle higher pressures-hotter powder-and shoot faster?
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  #6  
Old 06-21-2012, 09:28 PM
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Re: .270 win?

Both rounds have a saami max of 65k psi, wsm holds around 12 grns more powder and is short and fat which makes it more suitable for faster powders and burns more efficiently.
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  #7  
Old 06-22-2012, 02:08 PM
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Re: .270 win?

I suspect that for run-of-the-mill factory loads, economics plays a huge part in what powder is used. If a mfg. can use $.08 of powder B instead of $.10 of powder A in a load and get even similar performance, well powder B it is, regardless of how much it fills the case.
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