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6.5x55 and 6.5x55 AI

 
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  #1  
Old 04-11-2012, 11:05 PM
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6.5x55 and 6.5x55 AI

What could I see or expect if I AI my 6.5x55. What would the benefits be,if any.

thanks
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  #2  
Old 04-12-2012, 07:44 AM
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Re: 6.5x55 and 6.5x55 AI

According to the P.O.Ackley load manual you can expect around 100fps muzzle velocity increase over the non-AI version.
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  #3  
Old 04-12-2012, 07:53 AM
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Re: 6.5x55 and 6.5x55 AI

little bit faster.
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  #4  
Old 04-12-2012, 09:36 AM
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Re: 6.5x55 and 6.5x55 AI

Don't forget though, some of the best benefits aren't on the performance side but have to do with increased barrel/throat life, longer case life, and more consistent burns. All very good things in addition to the potential velocity gains. And with the PO you can shoot the standard cartridge in the new chamber to fire form and usually still get fine accuracy. With Ackley improvements the datum line stays the same for head-spacing. This makes fire forming very easy and also allows the use of store bought ammo if needed.

Scot E.
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  #5  
Old 04-20-2012, 03:50 PM
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Re: 6.5x55 and 6.5x55 AI

In my HVA 1540 with a 26'' barrel 123 gr scenars loaded with 55.5 gr of Vithavuori 560 gives around 3250 Fps and 63500psi
Suberb precision is achived with55Gr of N15(Similar to RL22\MPR) and 3100Fps\61500Psi with same bullets
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  #6  
Old 04-20-2012, 04:27 PM
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Re: 6.5x55 and 6.5x55 AI

Where are you deriving the Pressures from?

Quickload or are you using some kind of test fixture or extrapolating from load manuals?

3250 is better than a lot of 6.5-06AI's....

EDIT: Actually I was thinking 140's. But the Velocity is still surprising close to 6.5-06AI
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  #7  
Old 04-20-2012, 10:43 PM
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Re: 6.5x55 and 6.5x55 AI

Making an A.I. out of the 6.5x55 is one of the best to do it with IMO. It has a lot of taper in the original form and other good reasons were already given.....Rich
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