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 Post subject: Updated OALs
PostPosted: Tue Feb 15, 2011 10:50 pm 
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This is my latest data for most optimal feeding from an AR magazine.

• Hornady 110 V-Max, OAL: 2.068
• Nosler Ballistic Tip 125 grain, OAL: 2.085
• Remington AccuTip 125 grain, OAL: 2.130
• Sierra 150 FMJ-BT, OAL: 2.080
• Sierra 150 ProHunter, OAL: 2.040
• Sierra 155 #2156 Palma, OAL: 2.130
• Sierra 210 MatchKing, OAL: 2.190
• Sierra 220 MatchKing, OAL: 2.089
• Hornady 225, OAL: 2.140


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 Post subject: Re: Updated OALs
PostPosted: Tue Feb 15, 2011 11:39 pm 
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silencertalk wrote:
This is my latest data for most optimal feeding from an AR magazine.

• Hornady 110 V-Max, OAL: 2.068
• Nosler Ballistic Tip 125 grain, OAL: 2.085
• Remington AccuTip 125 grain, OAL: 2.130
• Sierra 150 FMJ-BT, OAL: 2.080
• Sierra 150 ProHunter, OAL: 2.040
• Sierra 155 #2156 Palma, OAL: 2.130
• Sierra 210 MatchKing, OAL: 2.190
• Sierra 220 MatchKing, OAL: 2.089
• Hornady 225, OAL: 2.140


What magazine? They are all different and respond differently.


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 Post subject: Re: Updated OALs
PostPosted: Wed Feb 16, 2011 12:16 am 
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Aluminum.


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 Post subject: Re: Updated OALs
PostPosted: Wed Feb 16, 2011 8:40 am 
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I remember you saying that these OALs are optimized to make the rib contact the bullet where its diameter matches the .223 case neck. Have you considered asking one of the die makers to make a comparator insert in that diameter? That way people could measure to a more consistent point than OAL (same idea as measuring base to ogive, just using a different diameter for the gauge).

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 Post subject: Re: Updated OALs
PostPosted: Wed Feb 16, 2011 10:32 am 
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Most of those values where made from CAD software loading the bullet and the magazine model and checking nominal fit.


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 Post subject: Re: Updated OALs
PostPosted: Wed Feb 16, 2011 1:30 pm 
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Just curious have you tried the funtion/reliability of the 300 Blk in a Beta Mag?


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 Post subject: Re: Updated OALs
PostPosted: Wed Feb 16, 2011 2:06 pm 
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No, but I have a SF mag on order and will eventually try that. I own Beta mags, but lost interest in them.


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 Post subject: Re: Updated OALs
PostPosted: Wed Feb 16, 2011 2:11 pm 
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Does this mean that the magazines with the rib removed will not be necessary?

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 Post subject: Re: Updated OALs
PostPosted: Wed Feb 16, 2011 2:19 pm 
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The magazines with the rib removed are necessary for ammo loaded longer. A prime example of this is 3-gun ammo which makes major PF. That calls for a 175 grain MatchKing loaded to 2.26 OAL which will make 330PF in a 16 inch barrel.


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 Post subject: Re: Updated OALs
PostPosted: Wed Feb 16, 2011 3:25 pm 
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Hornady 225

Are these available yet?


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