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Next Sin Cartridge?

 
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  #92  
Old 04-24-2012, 12:53 AM
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Join Date: Jan 2011
Location: Redlands CA
Posts: 151
Re: Next Sin Cartridge?

I am about as big of a 270 fan as exists anywhere, BUDLIGHT may top me but not by much. The problem with the 270 is that we have been a victim of its success. According to Brian at Berger Bullets, the 270 market is trapped by legions of 1 in 10 twist barrels that are currently in existence. The 1 in 10 in a 270 apparently will not accurately stabilize a bullet with more than a 530bc. Hence the Berger .530 bc 150 gr offering. To be effective at the superranges that this board specializes in, the bullet has to be north of .600 bc and the velocity over 3200fps in this size round.

So as sad as that is for me to say- a 270 sin without a 1 in 9 twist barrel and a manufacturer bold enough to mold a .650 bc 155gr bullet, would be a sin.

So i vote for the 7mm. Ill buy a 6,5 later.

Just dont tell Jack O'Conner if you see him, that I'm a traitor.
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  #93  
Old 04-24-2012, 10:07 PM
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Join Date: Mar 2002
Location: Wyoming
Posts: 2,615
Re: Next Sin Cartridge?

I hope I won't be bumping into him (Jack O) anytime soon. The last time I saw him was just before he died on a hunting trip in the Bull Mountains of Montana. He got a nice deer on the trip.
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  #94  
Old 04-25-2012, 07:16 AM
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Join Date: Jul 2011
Location: N.E.Ohio
Posts: 205
Re: Next Sin Cartridge?

Quote:
Originally Posted by Big Jake Duke View Post
I am about as big of a 270 fan as exists anywhere, BUDLIGHT may top me but not by much. The problem with the 270 is that we have been a victim of its success. According to Brian at Berger Bullets, the 270 market is trapped by legions of 1 in 10 twist barrels that are currently in existence. The 1 in 10 in a 270 apparently will not accurately stabilize a bullet with more than a 530bc. Hence the Berger .530 bc 150 gr offering. To be effective at the superranges that this board specializes in, the bullet has to be north of .600 bc and the velocity over 3200fps in this size round.

So as sad as that is for me to say- a 270 sin without a 1 in 9 twist barrel and a manufacturer bold enough to mold a .650 bc 155gr bullet, would be a sin.

So i vote for the 7mm. Ill buy a 6,5 later.

Just dont tell Jack O'Conner if you see him, that I'm a traitor.
True about twist, but thats with factory barrels. In this case we're talking about ordering barrels and wildcatting. 1:9 twist even 1:8 are avalible from barrel makers. I just ordered one for a build. So no reason to jump to the darkside," metric" .

Gene
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