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Post Info TOPIC: Light bullets/1:9 twist


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Light bullets/1:9 twist
 
 


 I have been shooting .223 in a 1:12 twist barrel and have had good luck with 40 gr bullets. Has anyone had any experience with 32 or 40 gr bullets and a 223 in 1:9 twist. I am considering buying one as I can load heavier bullets but don't know how it will react to light bullets.

gary

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Not sure about the 32gr & 40gr, but you should be fine with 50gr. and above. I'm shooting two .223's and have better luck with the 50gr. than the 40's.

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Walkingtall, With the 1:9 twist you would be over stabilizing the lighter bullets which is not a big problem. What that does is amplify any imperfections in the bullet. It most likely won't shoot the lighter bullets (quite) as accurately. With the quality of bullets we have available today it's probably a minor issue really but still I personally wouldn't go for the 1:9 twist unless I fully intended to shoot the heavier bullets. 
   Your 1:12 twist should stabilize up to a 60 grain with no problem but most likely no more than that. A 1:9 would take you up to a 70 Grain. If I was going to shoot a 70 Grain I'd be wanting a 243. 

That's just my thoughts for what it's worth.
  

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I had a Savage BVSS in the 9 twist barrel. It shot the 40g Sierra Blitz King's very well. There was not a difference between them and the 69g match. They would both shoot under .5 easy. Neck tension is important with the smaller bullets. I seated to the OAL that Sierra had and left it there.

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walkingtall;
my 223 is 1:8 twist but ive not tried any 40 grainers however it shoots the 50 grainers splendidly I do however agree with possums answer as the faster twist is for the heavier bullets I just lucked across a good 50 gr load and stayed with it because, like possum id rather shoot a bullet thats light and fast than heavy and slow. You may or may not do well with the 40 gr. bullets but its definitely worth a try.

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I have a heavy barrel savage in .223 with 9:1 twist. It shoots 30 gr. Berger, 35 gr. V-Max very well. Groups of less that 0.5 inch are common at 100 yards.



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my 1-9" .223 shoots its best with 45gr pills.

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You shouldn't have too much of a problem shooting the lighter bullets. I have a competition AR 1-7 twist. Its made for shooting the heavier bullets, but I've shot some lighter bullets with no problems. I like long range and you need the heavier bullets with better BC (ballistic coeffiecency) to buck the wind. Speed is great, but if you don't have BC then you can't accurately shoot very far if there is much wind. Wednesday I picked up my new Savage Model 25 in 223 with 1-9 twist. I'm still breaking in the barrel ,but is shot the 80 Final Finish bullets within .25 of an inch. When the weather breaks again I plan to finish breakin it in and the last bullets I plan to use are the Barnes Varmint Grenades in 50gr and 36gr.

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Dave Zwiener
Silver Creek, Nebraska
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Thanks Guys, Your commente are really helping me decide what to do. smile
Gary


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I recently shot a 1in 9" twist .223 with 36 grain Barnes bullets. It shot MOA but no better. They had to be pushed as fast as I could. The 55 grainers shot 1/2MOA.

-- Edited by olsingleshot at 14:59, 2008-07-18

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