The 22 creedmoor thread

[Nine Banger]

What evidence do you have to show that the thickness increases at the case mouth and can be trimmed off?

My observation was short 6.5cm brass resized had quite a bit of brass to trim off to get back to 1.920.

 

[Scooby-93]

That will have been from resizing, did you measure headspace on the brass at 6.5 and then what it is now at 22?
1.920 Is still long some of my 10+ firings brass hasn’t reached that length yet and it’s never been trimmed

 

[bcmntgoathunter.]

Shot the 22 creedmore 70 grain accubond factory ammo over my garmin and the ammo came out well below advertised 3134 fps ...my barrel is 22" so most likly 2" of the test barrel but the box says 3350 so even with say taking 60-70 fps off for the loss of 2" barrel the ammo is waaaaaay under performing just thought I'd let ya guy know mean while hand loads with my 80.5 berger full bore are running 3200 with lower es/sd with n555 and fed 210 match primer and alpha munitions brass.

 

[Tahr]

650 yard buck using 80 grn ELDX.
Douple shoulder penetration and exit. Travelled 15 yards. Excellent performance.
20" barrel and 3250 fps. Dialed 9MOA for shot.

 

[HandgunHTR]

It looks like 39.5gr H4350 is the end of the road for the 77s in my 18" barrel...around 3120fps.

I adjusted my sizing die just beyond the point where brass would not chamber and got the flat primers to go away.

I put the same load in my "once fired" brass that was formed before the die adjustment and the primers are flat but the bolt was not sticky.

I had stiff bolt lift and marks at 40gr and 40.5gr powder with the new size brass.

This barrel has around 160 rounds on it now.

I have a 19" 22-250 barrel here that will make the same speed with same projectile just under 37gr powder.

I realize I am a bit late to the discussion here, but...

What primers are you using? They look like Federal or CCI. If they are Federal, then I would say that the reason that some are flat and others are still a bit rounded (based on previous pictures) is because Federal cups tend to be soft.

I would let the base datum and velocity tell me when I was getting to pressure rather than flat primers when using Federals.

 

[Nine Banger]

What primers are you using?

They are White River Energetics.

 

[HandgunHTR]

They are White River Energetics.

Thanks. They are new enough that I don't know if they are hard or soft. Sorry.

 

[Scooby-93]

They are White River Energetics.

Have you tried some proper head stamped brass or tried Turning the necks on your current?

 

[mxgsfmdpx]

650 yard buck using 80 grn ELDX.
Douple shoulder penetration and exit. Travelled 15 yards. Excellent performance.
20" barrel and 3250 fps. Dialed 9MOA for shot.
View attachment 885525

Yeah man!

 

[Nine Banger]

Have you tried some proper head stamped brass or tried Turning the necks on your current?

I bought some factory ammo. It worked.

I don't want to buy the tools to neck turn brass. It seems like one of those reloading rabbit hole activities.

It seems like third the firing might be the charm. I had to trim heavy each time then it held size. Still not worth it tho, kind of like fire forming. I'll play around with it a little bit more and then probably order a few hundred rounds of factory ammo to get brass if I'm still having issues.

Most of my shooting lately has been 223 and 22-250 because I loaded a bunch of 22-250 right before this barrel showed up.

 

[Scooby-93]

I bought some factory ammo. It worked.

I don't want to buy the tools to neck turn brass. It seems like one of those reloading rabbit hole activities.

It seems like third the firing might be the charm. I had to trim heavy each time then it held size. Still not worth it tho, kind of like fire forming. I'll play around with it a little bit more and then probably order a few hundred rounds of factory ammo to get brass if I'm still having issues.

Most of my shooting lately has been 223 and 22-250 because I loaded a bunch of 22-250 right before this barrel showed up.

Compare the factory loaded necks to your loaded necks, that’s your answer. More clearance. Diameter not length

 

[StopMakingSense]

Didn't take long to get my 22cm working, 6 3/4 bear!

More to come on specs but I'm only pushing the 80gr ELDX ~2980 with 40.0 of H4350 in Alpha LRP w/ CCI200 out of an 18" barrel. The jump is .080 as I had them spec it to an 88 ELDM dummy (new brass new barrel)

 

[B_Reynolds_AK]

Didn't take long to get my 22cm working, 6 3/4 bear!

More to come on specs but I'm only pushing the 80gr ELDX ~2980 with 40.0 of H4350 in Alpha LRP w/ CCI200 out of an 18" barrel. The jump is .080 as I had them spec it to an 88 ELDM dummy.

View attachment 888312

View attachment 888314

Good work

Must be a new barrel and virgin brass huh?
The same amount of powder, same brass and that bullet are doing 3194 from my 18” that is throated for 88’s as well. Reached that after 120 rounds and second firing on the brass.

 

[StopMakingSense]

Yes, new brass, new barrel, only 50 rounds so far, what were your initial speeds?

Side note, the OBI Pad and the vertical butt pad adjuster for the HNT26 is dreamy.

 

[B_Reynolds_AK]

Yes, new brass, new barrel, only 50 rounds so far, what were your initial speeds?

Side note, the OBI Pad and the vertical butt pad adjuster for the HNT26 is dreamy.

I was right around 3090 or so with new barrel and virgin brass. Even now with the barrel fully broken in, a new batch of virgin brass dropped back down to 3135, from 3194 on twice fired.
Only difference in components are that I’m using Fed 210 LRP’s. ACE 7.5 twist barrel.

 

[bowhntr4lif]

Anyone order their 22 creed barrels from preferred on here? Waiting for mine and they quoted me 10-12 weeks and I’m at 15 now with little to no communication on updates when I’ll have it

 

[Cynoscion]

Mine came from Preferred. It came in on time. I never had any communication after my initial order until it entered production. At that point, I got an email stating they began work on it and then got other emails saying it finished and a final one saying it shipped.
I’d call them just to check in.

 

[Rugger7622]

I have a question? I'm seeing way more velocity with actual vs Gordan's reloading tool. I've attached a quick picture of a table that captures it. I'm not seeing any pressure signs, but he velocities are well above what GRT calculates. This is 2x shot brass. Stay here or go higher?

 

[HandgunHTR]

I have a question? I'm seeing way more velocity with actual vs Gordan's reloading tool. I've attached a quick picture of a table that captures it. I'm not seeing any pressure signs, but he velocities are well above what GRT calculates. This is 2x shot brass. Stay here or go higher?View attachment 888686

Alpha brass (just like Lapua) hides pressure signs pretty well, especially if it is SRP brass.

Primer pockets are most likely going to be your best indicator. If they start to loosen up on the next couple of firings, you should probably drop down a grain. If not, then rock on and be happy that you have a fast barrel.

 

[wind gypsy]

I have a question? I'm seeing way more velocity with actual vs Gordan's reloading tool. I've attached a quick picture of a table that captures it. I'm not seeing any pressure signs, but he velocities are well above what GRT calculates. This is 2x shot brass. Stay here or go higher?View attachment 888686

Is it calibrated for actual case volume and throat dimensions? I don't trust the tools absolutely but if you're getting 250ish FPS faster than what the tool says is mid 50k PSI, you're probably above SAAMI pressure. Whether that is a problem or not, beats me.

Alpha brass (just like Lapua) hides pressure signs pretty well, especially if it is SRP brass.

Primer pockets are most likely going to be your best indicator. If they start to loosen up on the next couple of firings, you should probably drop down a grain. If not, then rock on and be happy that you have a fast barrel.

Have you had primer pockets actually get loose on Alpha or Lapua SRP brass in a standard case head? I'd think that a guy would would have to be pretty damn hot to get that kind of result.