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Posted: 4/11/2006 3:15:32 PM EDT
O-K folks . . .

What’s the TRUE skinny on this . . . .

At 200 yards will a barrel with a 1X7 twist shoot 55 grain ammo with the same accuracy as a 1X9 twist barrel ? ?

And at 200 yards will the 62 grain ammo shoot that much better, if any, that the 55 grain ammo, out of a 1X7 twist barrel ? ?

Does this make any sense ?!?!?

Reason I’m asking is that my 15 year old son will be using one of my AR’s this year in the local High-Power League. Rifle has a 1X7 twist barrel.

Will the 55 gain ammo be O-K out to 200 yards ? ? ?

Thanks ! !

Link Posted: 4/11/2006 3:56:25 PM EDT
www.ammo-oracle.com

both should work fine out of either bbl or grain weight
Link Posted: 4/11/2006 4:38:29 PM EDT
[Last Edit: 4/11/2006 4:40:10 PM EDT by ru4freedom]
I shoot 63 gr. Sierra SP pretty much exclusively through my Colt MT Comp. 1:9"

It is by far the most accurate bullet I've tried in my 1:9" ......, and I've tried many different weights & shapes!!

Of course I'm refuring to shooting with quality optics & hand loads!! If you are inquiring about accuracy with iron sights and/or Factory loads..., I don't have a clue!!!

You might find this site helpfull.

http://stevespages.com/page8e.htm You'll have to cut & paste.., I don't know how to make it hot!!!

Link Posted: 4/11/2006 4:59:16 PM EDT
Link Posted: 4/11/2006 7:22:05 PM EDT
62 grain ammo was made to be shot froma 1/9 Minimi. Thats the ideal twist for the 62 grain projectile. That said you will have more barrl to barrel dfference in which barrellikes which load than diference because of twist.
Link Posted: 4/11/2006 7:27:11 PM EDT

Originally Posted By DevL:
62 grain ammo was made to be shot froma 1/9 Minimi. Thats the ideal twist for the 62 grain projectile. That said you will have more barrl to barrel dfference in which barrellikes which load than diference because of twist.



I may be corrected but I believe 69grn bullets hit the accuracy sweet spot for 1:9 twist barrels.



5sub
Link Posted: 4/11/2006 8:19:41 PM EDT
[Last Edit: 4/11/2006 8:20:12 PM EDT by RRA0211]
if you have a 1/7...nothing like some 75 gn tap 60 works great too
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