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.223 load using 75 gr hpbt

This is a discussion on .223 load using 75 gr hpbt within the Reloading forums, part of the Firearm Forum category; I can't find data for this load for an m77 bolt gun. Any help is appreciated....


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Old August 18th, 2012, 08:48 AM   #1
 
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.223 load using 75 gr hpbt

I can't find data for this load for an m77 bolt gun. Any help is appreciated.



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Old August 18th, 2012, 11:20 AM   #2
 
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Not sure what your specs are, but I worked up this load in my 26" Savage 12FV with a 1:9 barrel. I use 23.5gr of Varget under a Hornady 75gr BTHP bullet. I also have a H335 load which is 22.0gr with the same bullet.
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Old August 18th, 2012, 02:26 PM   #3
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A lot depends on the barrel twist, I used a hornady 75 in my match with a 1-8twist and used vargent at 24.5, real good grouping. started out at 24.0 vargent and worked up,any more than 24.5eemed to give me flyers.this was in an Oly ultra match ar
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Old August 18th, 2012, 03:18 PM   #4
 
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Hornady and Accurate powder has loads for 75gr hpbt. They work well in my Mini 14
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Old August 21st, 2012, 06:09 AM   #5
 
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Thanks guys. Rifling twist is 1:9 so I "think" the 75's will stabilize. Going out to find powder now.
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Old August 21st, 2012, 04:41 PM   #6
 
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My 9-twist shoots 77's to 1K with no issues.
Google: "Sierra 223 data"
They have some VERY close data, IMO
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Old August 22nd, 2012, 08:24 AM   #7
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To echo Darkker's comments, I think the 77SMKs would work in a 9-twist. They do in my 26" 9-twist. What twist rate is your gun, OP?

For load data, Lyman, Sierra, Hodgdon (online), Nosler, Ramshot (online), Accurate (online), and Hornady all have data for that weight or something extremely close to it for the 223.

Hornady's 75-grain A-MAX (longer even than the 80-grain SMK, IIRC?) was marginal when I lived at a mile of elevation. They worked out to at least 300, but weren't as tight as the 77 SMK. Now that I live a lot lower in the world, I'm not sure I'm going to get them to fly to 5 & 700 yards consistently. A Berger VLD-type 75 hpbt is going to have little or no chance of being stabilized well in a 9-twist. A Nosler Custom Comp may work fine (not positive, as I haven't shot those from my gun).
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