The 22 creedmoor thread

[Nine Banger]

Factory 80eldms depending on lot ran 3070-3120fps in mine after break in.

Are you by chance running a .218 bore?

Osprey 22 caliber Prefit Barrels - All Actions
All OBW 224 Barrels are 1:7tw 0.219 bore barrels for the best performance with the heaviest jacketed bullets and the modern, high performance solid bullets. The 7tw provides extra RPM necessary to stabilize the heaviest, longest jacketed bullets out at extreme distances but it's not too fast that it will cause problems shooting lighter bullets like 65-75 class either. It's a good balance of overall performance for a broad range of chambering options.

PVA-OBW-224SS

Receiver Options:Tikka T3 Family (shouldered install), Chamberings:22 Creedmoor (100 FB), Customer Supplied Reamer:No, Carbon Wrap Service:I want a Stainless Barrel, not carbon wrapped, Barrel Contour:0.75 Taperless (1.20 Shank, max thread size 5/8-24), Barrel Fluting Pattern:Spiral Fluting, Number of Flutes:8, Barrel Length:18", Muzzle Threading:5/8-24 Class 3A, Add an ATS Tuner (includes free muzzle threading):None, Seamless Blended Thread Protector:No, Cerakote - Barrel Only:Bead blast and clear spray (maintains bead blast finish better), Cerakote Options:None, Add a Muzzle Brake:None, Add Barrel Tenon Protector:No, Machine Work Rush Fee:No Rush Necessary

 

[5811]

Shots 5-20 from a 20" Prefered Tikka prefit. Factory Hornady 80 gr eldx. Just as reference.

 

[Nine Banger]

Being an eternal optimist, there's an upside to running slow with the 88's...

It's dead nuts on Quick Drop at 2750fps.

 

[Bluumoon]

Being an eternal optimist, there's an upside to running slow with the 88's...

It's dead nuts on Quick Drop at 2750fps.

Thats not nothing.

I've been shooting the crap out of a 20" 22CM the last 6-7 months, 77 TMKs. That being said a new 18" 6CM barrel has stolen my time for now, 112 gr MBs at 2900fps w a G1 of .620 is hard to ignore, 22CM isn't keeping up past 450 or so.

 

[Nine Banger]

I've been shooting the crap out of a 20" 22CM the last 6-7 months, 77 TMKs. That being said a new 18" 6CM barrel has stolen my time for now, 112 gr MBs at 2900fps w a G1 of .620 is hard to ignore, 22CM isn't keeping up past 450 or so.

Keep innovating, I'll be along behind you in a bit!

 

[ACHILLES]

Being an eternal optimist, there's an upside to running slow with the 88's...

It's dead nuts on Quick Drop at 2750fps.

I hear ya and that will still hammer stuff, just seems slow. I’m pretty sure Il be able to run 88s around 2800fps with 31gr of powder in a 18” 22arc I’m putting together.

 

[Lawnboi]

Being an eternal optimist, there's an upside to running slow with the 88's...

It's dead nuts on Quick Drop at 2750fps.

What are you realistically looking to achieve out of the 88? I still would give it 100 rounds, as long as accuracy is where you want it.

Last barrel I just broke in, a 6 dasher was 2680 for the first 50. By shot 200 it was 2790 and has stabilized in that 2790-2800 range. I have seen ospreys speed up more.

The 80eldx isn’t going to give up mich of anything balistically and is worth a shot as well.

 

[Nine Banger]

What are you realistically looking to achieve out of the 88?

I had no expectations for speed, but I was expecting more case fill and heavier charges than 33-34 grains which I can do with my 22-250.

 

[Lawnboi]

I had no expectations for speed, but I was expecting more case fill and heavier charges than 33-34 grains which I can do with my 22-250.

H4831 gives good case fill, mild pressure and decent velocity ime.

It is a hot rod. I got out and will be shooting a dasher this year.

 

[bojangles808]

if just shooting factory 80 grain ELDMs does the SAAMI .081 or .120 FB work better or it doesn't matter.

 

[Lawnboi]

if just shooting factory 80 grain ELDMs does the SAAMI .081 or .120 FB work better or it doesn't matter.

If I was only shooting factory loaded to saami spec I would do a saami chamber

But it probably wouldn’t matter much

 

[brockel]

Thats not nothing.

I've been shooting the crap out of a 20" 22CM the last 6-7 months, 77 TMKs. That being said a new 18" 6CM barrel has stolen my time for now, 112 gr MBs at 2900fps w a G1 of .620 is hard to ignore, 22CM isn't keeping up past 450 or so.

You think 2900 out of an 18”?

 

[B_Reynolds_AK]

You think 2900 out of an 18”?

I was around 2940 from an 18” PVA w/ 112 MB and 41.8 of H4350 after it was broken in.

 

[B_Reynolds_AK]

Thats not nothing.

I've been shooting the crap out of a 20" 22CM the last 6-7 months, 77 TMKs. That being said a new 18" 6CM barrel has stolen my time for now, 112 gr MBs at 2900fps w a G1 of .620 is hard to ignore, 22CM isn't keeping up past 450 or so.

That’s not exactly the case. Take a 80 ELD-X at 3170, as from my 18” bbl, and it outperforms the 112 MB at 2900 even at 900 yards.

5,000 DA
900 yards
10mph 90 degree wind

80 ELD-X: 5.4 mil, 1800 fps, 1.3 mil wind

112 MB: 6.0 mil, 1764 fps, 1.2 mil wind

 

[5811]

I’ve done a fair bit of side by side testing with folks shooting for “groups” at 100 yards and comparing groups size. Most shooters immediate response is to zoom the scope in as far as possible. This normally ends up being counterproductive for maintaining accuracy in 5-10 shot groups.

If a shooter leaves their scope around 8X or is using a fixed power scope in 6X 8x or 10x, when measuring average group size, the fixed scopes and scopes left at or below 10X result in smaller overall groups when looked at in larger data sets.

I see this written frequently. Is there a data set you can share or link to?

Seems like a lot of variables to sift through, so it would have to be significant. Not that I don't agree, I practice the same thing. I'd just really like to see the data or even a reference to a reference of the data.

 

[Scooby-93]

n565's not it...I flattened primers at 36.5 gr at 2500 fps...

You should be in the 43gr + area with n565 & 88eld

 

[Scooby-93]

You should be in the 43gr + area with n565 & 88eld

Also what is your loaded round diameter & fired case diameter?

If you have necked down the hornady 6.5 brass those necks are going to be really thick by the time you are at .224 dimensions if not neck turned.

 

[wind gypsy]

I’ve done a fair bit of side by side testing with folks shooting for “groups” at 100 yards and comparing groups size. Most shooters immediate response is to zoom the scope in as far as possible. This normally ends up being counterproductive for maintaining accuracy in 5-10 shot groups.

If a shooter leaves their scope around 8X or is using a fixed power scope in 6X 8x or 10x, when measuring average group size, the fixed scopes and scopes left at or below 10X result in smaller overall groups when looked at in larger data sets.

I have done no such testing but that is surprising to me unless there is parallax error or shooters are having “target panic” type issues.

Seems like benchrest scopes are 30x or higher with the sole purpose of shooting tightest groups.

 

[Nine Banger]

Also what is your loaded round diameter & fired case diameter?

Unfired:






Fired:





Loaded Neck:

 

[Bluumoon]

That’s not exactly the case. Take a 80 ELD-X at 3170, as from my 18” bbl, and it outperforms the 112 MB at 2900 even at 900 yards.

5,000 DA
900 yards
10mph 90 degree wind

80 ELD-X: 5.4 mil, 1800 fps, 1.3 mil wind

112 MB: 6.0 mil, 1764 fps, 1.2 mil wind

I was comparing the 77 TMK at 3330fps and 112 MB at 2900fps, 6800 ft elevation. Couldn’t find a load my current 22CM barrel liked w the 80s, hoping the next one likes 80s and 88s.

Starting to debate if I need the 22CM in the line up. It’s stupid fun to shoot, but is it half the barrel life of a 6CM fun to shoot? I suspect I’ll be done with the current barrel by the end of the summer and will have had a few months to compare.