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7mm-08-vs-7mm-08AI

 
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  #1  
Old 03-30-2006, 12:07 PM
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7mm-08-vs-7mm-08AI

With a 24" barrel,what velocity difference between these two cartriges?Would the AI version be worth the added fireforming,etc.Would a shooter really tell the difference in a hunting situation?
Thanks,
Jimmy
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  #2  
Old 03-30-2006, 02:35 PM
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Location: Long Island, New York
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Re: 7mm-08-vs-7mm-08AI

The 7mm-08 is already a fairly straight walled cartridge and velocity is not greatly improved by doing an AI conversion. Between the fireforming and the potential feeding problems my vote goes to - NO.

Improving the 7mm-08 is like improving the .308; not usually worth while, IMO.

However, wildcatting or just plain ol' improving is not always about practicality. Sometimes it's just for the fun of it. [img]/ubbthreads/images/graemlins/smile.gif[/img]
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  #3  
Old 03-30-2006, 09:11 PM
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Re: 7mm-08-vs-7mm-08AI

I have both calibers in 24 inch barrels. The AI is a Douglas premium SS and regular 7-08 is factory matte VLS. While both calibers are great rounds, the Ackley Improved is just plain cool looking with its 40 degree shoulder. I have found over three years of load development that the AI velocities are not significantly greater. But by getting a custom barrel, talented smith to chamber the round, it is more accurate than the regular 7-08. If I had it to do over, I would get a custom barrel in regular caliber.
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  #4  
Old 03-31-2006, 06:32 AM
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Join Date: Jul 2005
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Re: 7mm-08-vs-7mm-08AI

[ QUOTE ]
I have both calibers in 24 inch barrels. The AI is a Douglas premium SS and regular 7-08 is factory matte VLS. While both calibers are great rounds, the Ackley Improved is just plain cool looking with its 40 degree shoulder. I have found over three years of load development that the AI velocities are not significantly greater. But by getting a custom barrel, talented smith to chamber the round, it is more accurate than the regular 7-08. If I had it to do over, I would get a custom barrel in regular caliber.

[/ QUOTE ]
I agree with jhead7416 I don't think that the gain would be worth the fireforimg trouble. Your money would probably be better spent on a new Hart, Shilen, or other brand barrel. Then have it installed by a competent smith.
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  #5  
Old 03-31-2006, 04:30 PM
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Re: 7mm-08-vs-7mm-08AI

A better option would be to make the 7-08 into a 284 Winchester.
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  #6  
Old 04-01-2006, 03:43 AM
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Join Date: Nov 2005
Posts: 38
Re: 7mm-08-vs-7mm-08AI

I've been looking at the 284, but even the 7mm08 has to seat bullets into the case in a short action with 140g bullets. The 284 is a longer case so the bullets end up seating even deeper into the case so you must loose quite a bit of the extra capaicty if you stick to an OAL of 2.8
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  #7  
Old 04-01-2006, 04:00 AM
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Re: 7mm-08-vs-7mm-08AI

NZVarminter, I built my first 284 on a "short" action that required a 2.800 OAL. 140 gr bullets were easily pushed in the 2800-2900 fps range. My second rifle was built with a longer magazine box and other modifications to allow an OAL of 2.950. Now a 140 gr bullet will easily go 2900-3000 fps. An improvement over both 7/08s and great accuracy with the 284 case. Both rifles had 22" barrels. FYI. [img]/ubbthreads/images/graemlins/smile.gif[/img]
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