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Feb 12th, 2024
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 77 smk and 75 bthp .224 testing results
#6191074
02/19/16 09:01 PM
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Joined: Apr 2013
Posts: 2,418
tenyearsgone
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OP
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AR-15 built by me
Barrel: 20" LaRue Stealth 1:8 twist
Scope: VX3 2.5x8
Trigger: LaRue MBT
5 shot groups
77 SMK
22.1 AR Comp
.86 moa
77 SMK
22.7 AR Comp
.42 moa
77 SMK
23 AR Comp
.67 moa
77 SMK
23.2 AR Comp
.32 moa
75 BTHP
23 IMR 4166
.86
10 shot rapid fire
75 BTHP
24 IMR 4064
.67 moa
This barrel only has about 70 rounds through it so it may tighten up more. We shall see!
I tried 23.5 AR Comp but it caused the groups to open up to .9 moa along with cratered primers.
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Re: 77 smk and 75 bthp .224 testing results
[Re: tenyearsgone]
#6191086
02/19/16 09:11 PM
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Joined: Aug 2013
Posts: 2,072
cabosandinh
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some of those are excellent groups for an AR
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Re: 77 smk and 75 bthp .224 testing results
[Re: cabosandinh]
#6191092
02/19/16 09:15 PM
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Joined: Apr 2013
Posts: 2,418
tenyearsgone
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some of those are excellent groups for an AR Thanks! I got lucky with this one. My 6.8 AR gave me fits during load development. This one might dethrone the more accurate .223 AR in the safe. Going to be fun finding out! I have a 4th, but it's an M4 clone just for practicing/teaching fundamentals and general mischief. Yeah, I have a problem....
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Re: 77 smk and 75 bthp .224 testing results
[Re: tenyearsgone]
#6191122
02/19/16 09:37 PM
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Joined: Aug 2012
Posts: 603
Dien
Tracker
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Tracker
Joined: Aug 2012
Posts: 603 |
Nice. I will start loading 77SMK for my 18" Noveske barrel this weekend finally.
Did you load mag length or single feed?
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Re: 77 smk and 75 bthp .224 testing results
[Re: tenyearsgone]
#6191123
02/19/16 09:37 PM
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Joined: Jan 2012
Posts: 9,273
blackcoal
THF Trophy Hunter
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THF Trophy Hunter
Joined: Jan 2012
Posts: 9,273 |
What an honest eye opener. I thought all AR15s were 0.50 MOA out of the box using surplus ammo.  
The Greatest Enemy of knowledge is not ignorance,
it is the illusion of knowledge.--Stephen Hawking
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Re: 77 smk and 75 bthp .224 testing results
[Re: Dien]
#6191136
02/19/16 09:44 PM
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Joined: Apr 2013
Posts: 2,418
tenyearsgone
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Nice. I will start loading 77SMK for my 18" Noveske barrel this weekend finally.
Did you load mag length or single feed? Mag length. Just short enough not to catch on the inner wall. It's at least a 1:8 twist right?
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Re: 77 smk and 75 bthp .224 testing results
[Re: tenyearsgone]
#6191282
02/19/16 11:35 PM
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Joined: Dec 2009
Posts: 5,450
Big Fitz
THF Trophy Hunter
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THF Trophy Hunter
Joined: Dec 2009
Posts: 5,450 |
Dang good looking groups. I am building a few as well and hope to get some loads tested in the coming weeks. Is the chamber 223 Wylde?
I was wrong...on anything technical. Fitz............. is right, ya know............
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Re: 77 smk and 75 bthp .224 testing results
[Re: tenyearsgone]
#6191506
02/20/16 02:41 AM
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Joined: Aug 2012
Posts: 603
Dien
Tracker
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Tracker
Joined: Aug 2012
Posts: 603 |
Nice. I will start loading 77SMK for my 18" Noveske barrel this weekend finally.
Did you load mag length or single feed? Mag length. Just short enough not to catch on the inner wall. It's at least a 1:8 twist right? Yep 1:7. Hope they shoot well, picked up 1,000 of em at Cabelas on sale with coupon.
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Re: 77 smk and 75 bthp .224 testing results
[Re: Dien]
#6192142
02/20/16 08:18 PM
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Joined: Apr 2013
Posts: 2,418
tenyearsgone
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OP
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Posts: 2,418 |
Nice. I will start loading 77SMK for my 18" Noveske barrel this weekend finally.
Did you load mag length or single feed? Mag length. Just short enough not to catch on the inner wall. It's at least a 1:8 twist right? Yep 1:7. Hope they shoot well, picked up 1,000 of em at Cabelas on sale with coupon. It's worth noting that Alliant's website has 22.1 as the max for AR Comp. I found a lot of people reporting this was more of an accuracy spec than max. I, along with a lot others didn't find any pressure signs (at least until 23.5 grains) with the loads we tested. I inspected each casing after firing and they all looked normal. The Hornady 75 BTHP bullets are worth a look since they're almost half the price, but I haven't got them to be as accurate in a couple AR's. I've tested multiple powders and charges with them.
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Re: 77 smk and 75 bthp .224 testing results
[Re: Big Fitz]
#6192148
02/20/16 08:21 PM
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Joined: Apr 2013
Posts: 2,418
tenyearsgone
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Dang good looking groups. I am building a few as well and hope to get some loads tested in the coming weeks. Is the chamber 223 Wylde? No idea.
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Re: 77 smk and 75 bthp .224 testing results
[Re: tenyearsgone]
#6193299
02/21/16 08:22 PM
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Joined: Sep 2004
Posts: 294
HTDUCK
Bird Dog
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Bird Dog
Joined: Sep 2004
Posts: 294 |
Nice. I will start loading 77SMK for my 18" Noveske barrel this weekend finally.
Did you load mag length or single feed? Mag length. Just short enough not to catch on the inner wall. It's at least a 1:8 twist right? Yep 1:7. Hope they shoot well, picked up 1,000 of em at Cabelas on sale with coupon. It's worth noting that Alliant's website has 22.1 as the max for AR Comp. I found a lot of people reporting this was more of an accuracy spec than max. I, along with a lot others didn't find any pressure signs (at least until 23.5 grains) with the loads we tested. I inspected each casing after firing and they all looked normal. The Hornady 75 BTHP bullets are worth a look since they're almost half the price, but I haven't got them to be as accurate in a couple AR's. I've tested multiple powders and charges with them. Try the 75 Hornady's over 22.5 grs of Benchmark. I have 4 ARs and a Tikka T3 that are 1/8 twist. That combo shoots very well in all of them.
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