The 22 creedmoor thread

amassi

WKR
Joined
May 26, 2018
Messages
3,965
This is why I still haven't ordered my barrel, 3 days of argueing with myself between the 7 and 8. Might have to rethink manufacturers and find a 7.5. I know guys are shooting the 80s from 8 twists and having success but every way I've calculated it even they have marginal stability at low temp/ elevation and the 88s are a no go. Between spring bear hunting estuaries and nov/dec blacktail hunting on Vancouver island its commonly freezing or below at sea level to 500ft. The point of this build is to shoot heavy for caliber I don't want to be stuck in the 75 gr range of bullets

Just get the 1:7
Don’t make it any harder than it needs to be


Sent from my iPhone using Tapatalk
 

ACHILLES

Lil-Rokslider
Joined
Nov 26, 2017
Messages
221
Location
Texas
Is that really the difference? Will an arc do 3500? When it’s put that way, 4x barrel life makes 120 FPS difference seem pretty insignificant.
That’s with Peterson brass With Hornady or alpha they run 3070 it’s only a 100fps diff. But give the creed a 20” Bbl and it becomes 2930fps vs 3250fps.

Guys that have shot out multiple 22br barrels in prs running them with 88s & 90s seem to pull them around 3k but they’re still shooting though. The Br case has a 1-2gr more capacity than the arc. Arc has a lot more barrel life than the creed but it’s using 15gr less powder than the creed.

I would venture to say if Forms t3 223rem can still shoot well with 30k+ rounds through the barrel that the arc can make it to 3500 with a quality barrel.
 

huntnful

WKR
Joined
Oct 10, 2020
Messages
2,371
Components are starting to show up 🙌🏼

Build is going to be
Defiance Ruckus DLC’d
MDT XRS Chassis
Muller Works 1-8 twist #5 finished at 25-26”. No Muzzle threads.
Bix N Andy tac sport

Hopefully it drives tacks so I can test what prep work directly affects accuracy in larger sample sizes as well. The whole goal will be shoot out the barrel, while learning what matters with brass prep and loading, and what doesn’t matter. I feel like I have an idea, but would like to see it first hand with larger sample sizes.

Also going to do a ton of field shooting drills probably 800 yards and in, and track that progress as well.
IMG_5986.jpeg
 

waspocrew

WKR
Joined
Apr 2, 2022
Messages
875
Location
MT
Components are starting to show up 🙌🏼

Build is going to be
Defiance Ruckus DLC’d
MDT XRS Chassis
Muller Works 1-8 twist #5 finished at 25-26”. No Muzzle threads.
Bix N Andy tac sport

Hopefully it drives tacks so I can test what prep work directly affects accuracy in larger sample sizes as well. The whole goal will be shoot out the barrel, while learning what matters with brass prep and loading, and what doesn’t matter. I feel like I have an idea, but would like to see it first hand with larger sample sizes.

Also going to do a ton of field shooting drills probably 800 yards and in, and track that progress as well.
View attachment 759906
Nice pile of projectiles! Should definitely last you a while.
 
OP
L

Lawnboi

WKR
Joined
Mar 2, 2012
Messages
8,495
Location
North Central Wi
Components are starting to show up 🙌🏼

Build is going to be
Defiance Ruckus DLC’d
MDT XRS Chassis
Muller Works 1-8 twist #5 finished at 25-26”. No Muzzle threads.
Bix N Andy tac sport

Hopefully it drives tacks so I can test what prep work directly affects accuracy in larger sample sizes as well. The whole goal will be shoot out the barrel, while learning what matters with brass prep and loading, and what doesn’t matter. I feel like I have an idea, but would like to see it first hand with larger sample sizes.

Also going to do a ton of field shooting drills probably 800 yards and in, and track that progress as well.
View attachment 759906
Since you seem to like nice things….

SAC sizer with an expanding decapper mandrel. One pull does it all.
 
OP
L

Lawnboi

WKR
Joined
Mar 2, 2012
Messages
8,495
Location
North Central Wi
Got a group in with the 80eldx.

10 shot, decent SD, non issue for a 500 yard rifle.

42 h4831sc, alpha srp brass going 2955 average.

I’m guessing my LRP brass will yield another 30-40 fps like everything else.

Need to slap on my nx8, hard to shoot small groups with the shv, and if I’m going to hunt with this I’m putting the nx8 on.


H4831sc is what I’d go with for powder going forward, atleast for now I like to load. This load is moisture/heat safe in my rifle. And much easier on the brass.


At 6500’ this is now an 8mph rifle out to 500 yards and is a full half mil flatter than the 223(w 75eldm). The tmk numbers are even worse for the 223.

A 20” 7.5 twist sending the 80 eldx at 3100+ is appealing…
IMG_1027.jpeg
 
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swavescatter

Pain in the butt!
Joined
Apr 3, 2021
Messages
1,300
I'd appreciate everyone's opinion in a thread on my build here:


Thanks in advance...
 

SouthPaw

WKR
Joined
Apr 10, 2014
Messages
852
Location
Northern CA
Got a group in with the 80eldx.

10 shot, decent SD, non issue for a 500 yard rifle.

42 h4831sc, alpha srp brass going 2955 average.

I’m guessing my LRP brass will yield another 30-40 fps like everything else.

Need to slap on my nx8, hard to shoot small groups with the shv, and if I’m going to hunt with this I’m putting the nx8 on.


H4831sc is what I’d go with for powder going forward, atleast for now I like to load. This load is moisture/heat safe in my rifle. And much easier on the brass.


At 6500’ this is now an 8mph rifle out to 500 yards and is a full half mil flatter than the 223(w 75eldm). The tmk numbers are even worse for the 223.

A 20” 7.5 twist sending the 80 eldx at 3100+ is appealing…
View attachment 760256
Nice, that will kill. I like H4831sc for the 79/80g too. 42.5g shoots the 79g DRT and 80g ELDM around 3200 in my 20" 7.5tw.
 
Joined
Dec 13, 2017
Messages
676
Location
SE AZ
As expected, underwhelming speed. Accuracy was great, speed was not.

16.5” 1:8 barrel (Tikka 223 originally)
Peterson LRP Brass
CCI 34 primer (magnum)
88gr ELD-M
39.3 gr Superformance (guesstimate right around max Hodgdon book load)
2660 fps average

Based on Hodgdon’s data, this load should produce somewhere around 3050 fps out of a 24” barrel, so I would have expected 2750-2800 fps.
Now that Hornady has released load data and I have more rounds on the barrel, I took another crack at this today.

Hornady lists a max load of 41.5 gr Superformance for the 88 ELD-M, going 3150 fps out of a 24” barrel.

41.0 gr got me a 2889 fps average with a 100 yard 10 shot group right under an inch. Spread of 43.5 fps, standard deviation of 17.2.

Not a max load, but that puts me at roughly a 30 fps loss per inch of barrel cut. Right where I expected to be with this rifle. My prior disappointment is now gone.
 

ID_Matt

WKR
Joined
May 16, 2017
Messages
1,590
Location
Southern ID
Interesting comparing the hornady load data to the Peterson testing that was done. Peterson shows 42.5 grains of RL 26 with a 75 eldm at 62K PSI in a universal receiver…. Hornady max load with the same is 47.7 grains. That is a SUBSTANTIAL difference
 

ACHILLES

Lil-Rokslider
Joined
Nov 26, 2017
Messages
221
Location
Texas
Peterson brass has less capacity so data is going to be slightly different. But I agree the differences with rl26 and superformance seem vastly different with the 75gr.
Maybe just the difference between barrel bore diamters .218vs.219, freebore difference, different powder lots, difference between Hornady & peterson brass internal capacity, and possibly different barrel brands between the test barrels used by Peterson and Hornady.

With my 18” and h1000 with 80elds

42.5gr 3050fps peterson brass
43.5gr 3070fps Hornady brass
 
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