The 22 creedmoor thread

[david2duck]

Did a pressure test tonight in my dad’s factory tikka 22-250 that we had rechambered in 22cm with H4350 and 88’s in hornady brass. Slight ejector mark at 41gr. Loaded 20 at 40.5 and will test them tomorrow morning.

 

[Castle Rock]

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

Yes that’s why it’s important to compare data from several sources. Unfortunately many people stick to the dogma that if it’s published it is correct.

 

[wind gypsy]

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

Yeah, 12% increase is huge!

Yes that’s why it’s important to compare data from several sources. Unfortunately many people stick to the dogma that if it’s published it is correct.

There’s been like 4 threads in the past year from people with “early” pressure signs in Peterson or ADG brass 6 creed and there’s usually a “but the book (with hornady brass) says max is XX”.

 

[ID_Matt]

Yeah, 12% increase is huge!


There’s been like 4 threads in the past year from people with “early” pressure signs in Peterson or ADG brass 6 creed and there’s usually a “but the book (with hornady brass) says max is XX”.

Plays right in to the point Peterson was trying to make with that article - that many people are running the cartridge way hotter than they realize

 

[Lawnboi]

Shot some more 80eldx. New lot of H4831sc, 42gn is pushing them 2970 average with excellent SD. Not at all hard on brass either.

Match season is over so the Magnus got a soak and will live on the 22 creed through hunting season. 16” barrel and ultra 7 was a little harsh. The Magnus is much better to the ear and recoil is even slower.

 

[Miflatlander91]

I just had some of the eldx delivered today with a new box of alpha brass to play with. The 88s were shooting pretty good but I couldn’t not try them.


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[Kimber7man]

Shot some more 80eldx. New lot of H4831sc, 42gn is pushing them 2970 average with excellent SD. Not at all hard on brass either.

Match season is over so the Magnus got a soak and will live on the 22 creed through hunting season. 16” barrel and ultra 7 was a little harsh. The Magnus is much better to the ear and recoil is even slower.

I might have to try my Magnus on the 18" 22 creed this Saturday. Bet it makes it so pleasant...

 

[ChrisAU]

I decided to build a 2nd 16.5” 22CM for a dedicated night rifle and did paperwork today on a full size Resilient Jolene. The DD Wolf Hunter sounds amazing on my hunting rifle, can’t wait to try this one out.

 

[swavescatter]

WTF - anyone notice this before?

Bullet diameters for 77 TMK's and 80 ELDM's are consistently 0.2235" diameter. 88 ELDM's are consistently 0.224". With a tight throat/bore, I'm wondering if my dud barrel might shoot lighter bullets...

 

[Lawnboi]

 

[Lawnboi]

WTF - anyone notice this before?

Bullet diameters for 77 TMK's and 80 ELDM's are consistently 0.2235" diameter. 88 ELDM's are consistently 0.224". With a tight throat/bore, I'm wondering if my dud barrel might shoot lighter

75, 80 eldm and X are worth a try. On paper they are really not far behind the 88. Out of my 16” the wind number is exactly the same out of the 80 and 88. Your not going to shoot the difference.

 

[Miflatlander91]

Loaded some of the 80 eldx tonight looking for pressure with to 23 never did find it hit 3100 out of an 18” barrel I plan to go back to h4350 and see what that does in the am then load both powders and see what groups the best


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[Miflatlander91]

Well the eldx and my barrel get along great speed wise 10 shot groups look like an extra full choke shotgun at 100… I went back and loaded 5 of the 88s and they printed a real nice 1/2” group I think I’ll leave it alone


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[david2duck]

The 88’s shot like garbage out of my dad’s gun. Trying the 80 ELDM’s this weekend.

 

[HighUintas]

How's everyone getting along with this cartridge as far as having to clean or not? Inknowna few guys found that with the current barrels they had, they had to clean every 150 or so to prevent issues

 

[Miflatlander91]

I’m at about 700 and never ran a cleaning rod through the barrel


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[waspocrew]

450 ish on my barrel - haven’t cleaned it at all.

 

[david2duck]

Only 120 on mine but zero cleaning.

Now 140.

 

[Lawnboi]

Iv been cleaning every hundred rounds. But I clean everything

 

[SouthPaw]

Almost 400 rounds now, never cleaned.