AR15.Com Archives
 223 68gr question
GunReaper  [Member]
2/18/2011 3:50:35 PM EST
I've been reloading the 50gr v-max with imr-4895 powder with good results. However, I've been wanting to goto a larger grain bullet like the 68gr BTHP by hornady. While looking for some load data I found several people saying that a 16" AR15 with 1:9 twist doesn't stabilize the 68 gr bullets. Is this true? Shouls I go with a 55-60gr bullet instead?

I have 3 AR-15s. My colt has 1:7 twist, but my bushy and RRA has a 1:9 twist.

Any input, please?
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AeroE  [Moderator]
2/18/2011 3:57:25 PM EST
A 9 twist barrel will shoot that bullet perfectly.

I suggest a 69 grain MatchKing.

Eric802  [Team Member]
2/18/2011 6:01:11 PM EST
The 68gr Hornady is noticeably longer than the 69gr SMK. It's almost as long as the 75gr Hornady. Personally, my 1/9 hated them. From what I've read, the 68's are more "hit and miss".
dryflash3  [Moderator]
2/18/2011 6:41:36 PM EST
Every rifle is a little different.

My 1 in 9 AR would shoot the Hornady 68 gr ok, and the Sierra 69 gr very well.
zw123  [Member]
2/19/2011 6:24:08 AM EST
My RRA 1X9 likes the Sierra 60 vs the SMK 69.
GunReaper  [Member]
2/20/2011 4:36:24 PM EST
I was going to go with the hornady 60 gr v-max, but they don't offer it in a boattail. Don't know if the boattail really matters anyways. I already ordered 2 boxes of the 68gr from hornady. I use IMR-4895 for my 308's, but wonder if I should go with varget since the 223 with the 68gr will most likely be full or close to compressed?
barrysuperhawk  [Member]
2/20/2011 5:05:35 PM EST
69 Noslers and 70 Gr Samsons shoot fine for me, Hornady's are shaped differently and none of my guns like them...
ma96782  [Team Member]
2/20/2011 5:30:41 PM EST
Barrels and bullets vary (not only weight matters).........

But.....simply put..........

http://www.razoreye.net/mirror/ammo-oracle/AR15_com_Ammo_Oracle_Mirror.htm#whattwist

Aloha, Mark
COSteve  [Team Member]
2/20/2011 5:47:11 PM EST
Yes. every barrel is different. My RRA chrome lined 1:9 A4 doesn't like 69grn SMKs but does like 68grn Hornadys. Go figure.
elk_chaser1  [Member]
2/21/2011 12:53:11 PM EST
1-9 twist for my AR upper. Shoot's the Hornady 68 grain BHTP just fine with 24 grains of Varget.
rock71  [Team Member]
2/21/2011 1:24:41 PM EST
My chrome 1:9 Bushmaster 16" will shoot 68 grain Honadays into under an inch at 100 with 24g IMR 4895.
The same gun does 75g Hornadays just as well over 23.5g IMR 4895.
If you drop a 68 and a 75 grain Hornaday on the table you almost need to weigh them to tell them apart.

GunReaper  [Member]
2/21/2011 3:27:40 PM EST
So.... What's the thought on powder type? Should I go ahead and use my IMR-4895 powder or would using varget be better? According to my hornady book varget and Imr-4895 load data are simular on the max load side other than varget at max load runs a little lower pressure?
borderpatrol  [Member]
2/21/2011 4:08:57 PM EST
The top powders for service rifle competition, in no particular order are:

H4895
Varget
RE-15
N140

Any of these will work fine. Adjusting the powder charge to suit your rifle is all that is needed. H4895 (not IMR-4895) is preferred because it's slightly finer grained. 24.0 grains of H4895 is a standard load with 68/69 grain bullets seated at 2.250" Start a little lower and work up to it.

Varget, RE-15 and N140 all shoot well with 68/69 grain bullets around 24.5 grains. Start around 24.0 and don't go over 25.0 and you'll find out what your rifle prefers from these three.

RE-15 and N140 meter better than Varget or H4895.
rock71  [Team Member]
2/21/2011 4:24:14 PM EST
Originally Posted By GunReaper:
So.... What's the thought on powder type? Should I go ahead and use my IMR-4895 powder or would using varget be better? According to my hornady book varget and Imr-4895 load data are simular on the max load side other than varget at max load runs a little lower pressure?


I don't know what's better. I had 8 lbs of IMR 4895 due to reloading for the Garand and M1-A. That it works well for my .223 loads is just a bonus.
CTone03  [Team Member]
2/25/2011 1:50:32 PM EST
I have a 16" 1/9 twist DPMS that I have shot out to 710 yards with the 69 grain SMK and 24.5 grains of Varget. Muzzle velocity is a chronoed 2,600 fps on the money, and the bullets were just starting to de-stabalize at that range but were still accurate. 650 yards is no problem.

My range report - http://fateoflegions.blogspot.com/2010/11/going-distance.html

I use Winchester cases and CCI BR4 primers. I had worked the load up to 26 grains which gave me pressure signs, and I backed down to the upper end of the node that I had found at 25 grains which was giving me a little bit of vertical dispersion. 24.5 grains of Varget gets the job done well.
GunReaper  [Member]
2/27/2011 5:59:19 PM EST
Rock71, with that 24.5 imr 4895 how far are you seating the 68's?
rock71  [Team Member]
2/28/2011 3:36:30 AM EST
2.260 OAL,

COSteve  [Team Member]
2/28/2011 6:44:59 AM EST

Originally Posted By GunReaper:
So.... What's the thought on powder type? Should I go ahead and use my IMR-4895 powder or would using varget be better? According to my hornady book varget and Imr-4895 load data are simular on the max load side other than varget at max load runs a little lower pressure?

Mine likes TAC and BLC (2) just fine and as both are ball powders, they work just fine on my 650.
GunReaper  [Member]
3/4/2011 7:09:15 PM EST
well, I got my 68gr BTHP's. Still debating whether to go buy some varget or use what I got which is IMR4895. Looking at Rock71's target makes me at least want to try the imr4895. Anyone else use or have used imr 4895 specifically with 68-69gr bullets in an ar-15 platform?
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