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9/22/2017 12:11:25 AM
Posted: 7/23/2003 6:09:12 PM EDT
Hello, I currently own 2 AR 15 rifles, one is a 16" bbl with a 1/9 twist and the other is a 20"
bbl with a 1/7 twist. I reload just about all my my own ammo(except for the inexpensive steel case stuff) I am using LC brass, BLC-2 powder 27.3 Gr, and 55Gr. bullets from Scharch Mfg.
My question is, what bullet do you think will work best in my rifles, the 55 or the 62Gr FMJ?
As of now, I have only been using the 55Gr stuff in both of my rifles. Your reply would be greatly appreciated.
Link Posted: 7/23/2003 6:26:47 PM EDT
Work best for what purpose?
Link Posted: 7/23/2003 6:46:32 PM EDT
55 is lighter so you will get a little more velocity,good when you have a carbine.
Link Posted: 7/23/2003 6:46:43 PM EDT
Hummm...... www.ammo-oracle.com Hope this helps. Spooge Out!
Link Posted: 7/23/2003 6:59:40 PM EDT
62grn will work fine in your 1:9 and I would go heavier - at least 69grn for the 1:7.
Link Posted: 7/23/2003 8:26:42 PM EDT
So if I'm looking for all out tack driving accuracy using my 55Gr.FMJ bullets, I need to look for a bbl with a twist rate of 1/12, is this correct? And if I continue using these 55Gr bullets, my accuracy will always be in the so so category in my 1/7 and 1/9 twist barrels. I think I can only purchase 55Gr and 62Gr in large bulk quantities. Is this true? Because that is how I have been getting my 55Gr. bullets.
Link Posted: 7/23/2003 9:20:55 PM EDT
Originally Posted By Beerbellybo: So if I'm looking for all out tack driving accuracy using my 55Gr.FMJ bullets, I need to look for a bbl with a twist rate of 1/12, is this correct? And if I continue using these 55Gr bullets, my accuracy will always be in the so so category in my 1/7 and 1/9 twist barrels. I think I can only purchase 55Gr and 62Gr in large bulk quantities. Is this true? Because that is how I have been getting my 55Gr. bullets.
View Quote
The accuracy sweet spot for 1:12 twist barrels is 55grn.
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