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Over-stabilizing a bullet?

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Unread 04-12-2011, 08:52 AM
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Join Date: Jun 2009
Location: Afognak Island, Alaska
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Over-stabilizing a bullet?

I just finished a new build. It's a 6mm Ackley Improved with a 1-8 twist. I originaly wanted to shoot 105s and 107s but the throat is a little short so, thinking that the longer bullets would eat up some case capacity, I tried some 75 Vmax and 75 Sierra HPs. The Sierras flew incredibly well. A guy that has a similar set-up was surprised that I could get a lighter bullet like a 75 to fly so well out of such a tight twist. I know a tighter twist robs a little speed but can you over-stabilize a lighter bullet to where it ruins accuracy??
Long Range Sickle
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Unread 04-12-2011, 10:18 AM
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Join Date: Nov 2010
Location: Billings, MT
Posts: 332
Re: Over-stabilizing a bullet?

I think it will depend a lot on the light bullets construction. Light jacketed varmint bullets may come apart after leaving the barrel from too high of an RPM, due to the tight twist.

How ever I think if the bullets hold together long enough to hit say a P-dog, could be quite spectacular!

I don't think it will hurt accuracy enough to worry about.
There are only two seasons: Hunting season, and Getting Ready for Hunting season. -DAD
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Unread 04-12-2011, 05:13 PM
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Join Date: Jun 2001
Location: Potomac River
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Re: Over-stabilizing a bullet?

The 95 Berger has a very short bearing surface and a high BC and likes a fast twist.

Jam it to test loads and then ease it back a little.
The Smokin Fur Rifle Club
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Unread 04-12-2011, 05:40 PM
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Join Date: Apr 2008
Location: Central ND
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Re: Over-stabilizing a bullet?

I have a unique chance to talk with Richard Schatz quite a little. When visiting with him about fast twist light bullets he mentioned some of his friends were doing it. They turned a pdog into red mist. "They hit like Thor's hammer" he said.

"Amazing things can happen when preparation meet opportunity" Richard Schatz

"The will to win, compares little with the will to prepare to win" Donovan Moran
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Unread 04-12-2011, 06:41 PM
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Location: Allen, TX
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Re: Over-stabilizing a bullet?

Let's just theorize that you might do a little better with your rifle and 75gr bullets if you had a little slower twist.

But, it obviously hasn't completely ruined your groups.
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Unread 04-12-2011, 07:22 PM
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Join Date: Nov 2005
Location: Texas
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Re: Over-stabilizing a bullet?

Even if the bullet flies true------if spinning TOO fast will upset excessively at impact causing the bullet to fail. Lead core but the copper I do not know about.
The Truth Is Not Always Good For Business!!
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Unread 04-13-2011, 12:02 AM
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Join Date: Dec 2007
Location: sebastopol, ca.
Posts: 418
Re: Over-stabilizing a bullet?

My Hart barreled 8 twist 6br was set up for long range squirrel shooting with the 105 and 107's but it shoots the 75 vmax really well and is a grenade when it hits. Seems that ricochets are minimal too.
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