22 Creedmoor

Specifications

Parent case 6mm Creedmoor
Bullet diameter .224"
Neck diameter .254" (loaded)
Shoulder diameter .462"
Shoulder Angle 30°
Rim diameter .468" 
Web diameter .468"
Case length 1.920"
Overall length 2.825"
Case capacity 52 gr H2
Primer type large rifle or small rifle

Neck Bushing size:    .250 +/-

The 22 Creedmoor is quickly establishing itself as the go-to big 22cal. The advent of the 6mm Creedmoor immediately had folks necking the hornady 6mm down to 22 cal and upon doing so found virtually the perfect case capacity for heavy weight .224 bullets. The .22-243AI, middlestead, and 22-6 were speed demons to be sure, but there were always crippled due to mag length restrictions or fire forming considerations. The 22-250AI was always an option, but many folks weren't accepting of fire forming. This left the straight neck-down of the rather vanilla 22-243win the most appealing option for those wanting more 22cal performance than a straight 22-250 would offer.  Yet the 22-243 had obstacles of its own, with it often having somewhat narrow and finicky accuracy nodes. Then too there was always the discussion of barrel life, and cases with lots of body taper and shallow shoulder angles tend to tear up throats. There certainly was room for a "better mousetrap" and the 22 Creedmoor does an exceptional job of filling that void. 

The 22 Creedmoor finds itself in the perfect configuration for functionality with heavy bullets within short action magazine system limitations. Getting to 22CM from 6CM is a straight forward pass through a FL die. Now we have Alpha Munitions producing factory 22 Creedmoor brass, and the stage is set for a complete takeover of the big 22cal scene. It will not be long and 22CM dies will be in stock at the usual sources. 

I have been shooting 22 Creedmoor since 2014 and have pressed it into service as my primary coyote hunting cartridge. The tough northern coyotes we hunt have a reputation for taking some vicious hits and then just getting back up to run off. This is something that plagued me with the traditional 22-250 and caried over into the 22-243win I ran prior to switching to the 22 Creedmoor. Even when using the venerable mainstay 52gr SMK at 4100fps from the 22-243, it was not uncommon to have squarely hit coyotes get knocked down and then run off to die 150yds later. No doubt running a heavier bullet with both the aforementioned cartridges could have eased my troubles, but I was quite interested in the Creedmoor and wanted to try it out. 

Several years later and the 22 Creedmoor has completely established itself among my 22 cal firearms. The 22-243win and 22-243AI I was shooting have found themselves virtually untouched, while the 22CM has dominated coyotes in a way no other 22cal has before it. The accuracy nodes are wide and forgiving, the feeding is boringly reliable, and the performance out in the world has been dominating. My main 26" barrel is pushing 80gr Berger's at 3525fps and is relentless inside 800yds.

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Bullets

Bullets being an entirely application-driven choice makes it difficult to suggest one, but if you're looking for top choices for the 22 Creedmoor they would easily be the heavier of the class such as 75gr hornady, 80gr SMK, or 80gr Berger. 

Brass

Alpha Munitions is producing factory 22 Creedmoor brass and this would seem the most logical choice. However you can also neck 6mm Creedmoor down to 22cal easy enough. You could even use small primer 6.5mm brass, it would simply take a bit more work to neck down. 

Powder

Varget, H4350, and H1000 are the most common powders used with the 22 Creedmoor.  Varget and the faster propellents finding favor with the light weight bullets in the 50gr range while H4350 and H1000 being used with the 75- 80gr class bullets. 

Primers

Your favorite large rifle or small rifle magnum primer. Federal and CCI offerings are most popular. 


All load data for reference only. Use at your own risk!

Starting Load Suggestions

Bullet Brass Primer Powder
80gr Berger Hornady CCI-200 H4350, 39gr
52SMK Hornady CCI-200 Varget, 40gr

Documented Load Data

Bullet Brass Primer Powder OAL Velocity
80gr Berger Hornady CCI-200 H4350, 43gr 2.590" 3525fps
80gr Berger Hornady CCI-200 H4350, 41gr 2.590" 3400fps

 


Left to Right: 223AI, 22BR, 22-250, 22 Creedmoor, 22-243win, 22-243AI


Necking down 6mm Creedmoor to 22 Creedmoor

When starting with 6mm Creedmoor brass, you will need to neck it down to produce 22 Creedmoor. 6CM starts out at a neck diameter of approximately .271" and a loaded 22 creedmoor with hornady brass will end up at about .254-.255".  If you've neck turned, it will be closer to .252".  You can use a full length (no bushing) sizing die to go from 6mm all the way to 22cal in one step, so long as the die is of good quality. A .250 diameter neck will typically provide desirable results for both as long as you are running an expander ball of the appropriate diameter in your die. Those of you using bushings will typically want to take two steps to neck down. Starting with a .260" bushing on the first pass and finishing with a .250" will often work quite well. 

When I must neck down a cartridge, I typically start with a bushing die and use various bushings to get the desired result. Once I lock in on the bushing size required to size effectively, I will load up 3 rounds at a hot load and fire them in my chamber. I then send those pieces of fired brass off to Whidden Gunworks to have a custom full length sizer and micrometer seater die set made. 

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