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Posted: 2/10/2009 12:53:46 PM EDT
| I have an AR with a twist rate of 1/9 I know that a 1/9 twist can stabilize rounds that are between 50-69 grains, some can even stablize slightly heavier bullets. I have been searching google and this board to see if I'd be able to shoot lighter bullets like 40 grainers, but all I have found is people trying to shoot heavier bullets. The reason I'm asking is it seems like it is getting a little harder to find bullets in the 55-65 grain range. I would just be using them to shoot at 50-100 yds. |
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There was an article in Handloader magazine about light bullets in the .223. The author got 1/2 MOA from 40-gr Nosler Ballistic Tips and Hornady V-Maxs in a 1-8" RRA Varmint AR15 and a fast-twist Savage 110. The AR was more accurate than the Savage BTW. The only light bullets that gave any problems were the short, light-jacketed 40 and 45 grainer SPs intended for the .22 Hornet.
So stick with Nosler BTs and Hornady V-Max in 40 and avoid ultra-thin jacketed 50-55 grain bullets intended for 1-12" .223s like the 50-gr Speer TNT or Hornady SX. Speed and varmint explosiveness is very impressive with the good 40s. 
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