.223 load development and velocity

jaybic

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Aug 6, 2017
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52
rochester mn
Hello,
I am working up a load for my .223. 26 inch 8tw....Bartlein tube. I have about 250 rounds on it so far and am running Lapua brass, varget and 75 eldm bullets on top of 450s. accuracy is seems fairly good at about 1/2 moa. The average velocity is 2739fps and an sd of 12. Does that seem slow at all?
 
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Srikaleak

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May 11, 2018
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For reference, I am pushing a 68gr BTHP through a 12.5in AR15 barrel at 2500fps. I know the weight of the bullet is a little lighter but you've got 14 more inches of barrel on me. How much Varget are you using?
 

jaybic

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Sorry, I just reread my post and had to edit...it should say 2739...NOT...2339 fps.....still seems a bit pokey compared to what you folks are seeing though....sorry for the mix up...and it is 23.5 grains of Varget...
 

jaybic

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Aug 6, 2017
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COAL is 2.507. Bolt falls on a dummy round at 1.955-5 with the firing pin and ejector removed. (EDIT...not 15 thou off rifling as stated earlier but 5 thou off. It appears I have made a mistake. I tried to load at 1.950 BTO but when I measured just now it was at 1.960(which is a 10 thou jam and NOT the 5 thou off that I intended them to be. I dont know if this helps but just thought i would put it out there.