The 22 creedmoor thread

[Pickettpuncher]

Damn! My 18" is gonna top around 3000k with a 77tmk using 4831sc. At 3100ish, I saw decent pressure. I might need to grab some N560

I stayed right at 3k. Had some neck tension issues and they went up to 3040-3080. Huge swings. But I had a .29 moa group at 300. Hard to argue with how it shoots, but I’m burning alot of powder to be at arc speeds

 

[ChrisAU]

I’m at 3065 out of a 16.5 with 77 TMKs. N555, can’t remember charge off the top of my head but it was walked back a fair amount from first pressure signs. In testing I got up to 3200 with light ejector swipes IIRC.

 

[The Guide]

Curious, what is your dial for the 420y shot at 4000 DA? What did Shooter say it was at -170?

The drops and drifts aren't that mud of a difference, generally 0.5 MOA or less but the velocity drop is what is more important to me. On a 6.5 PRC with a 156 Berger the drop in velocity was only around 70 fps. On my 223 with the 77tmk, the drop is about 145 fps. While it isn't that much, I'm not trying to see what the lowest velocity is that will still kill an elk. When temperatures start chasing close to negative temperatures I will continue to use cartridges that use large rifle and large rifle magnum primers due to personal preference.

Jay

 

[Matt5266]

The drops and drifts aren't that mud of a difference, generally 0.5 MOA or less but the velocity drop is what is more important to me. On a 6.5 PRC with a 156 Berger the drop in velocity was only around 70 fps. On my 223 with the 77tmk, the drop is about 145 fps. While it isn't that much, I'm not trying to see what the lowest velocity is that will still kill an elk. When temperatures start chasing close to negative temperatures I will continue to use cartridges that use large rifle and large rifle magnum primers due to personal preference.

Jay

Just throwing my data out there shooting my 223 with 77 tmk im at 3700 elevation, and sighted in at 50ish degrees. Shot my elk this year at 410 yards at 8500 feet in 11 degrees temp steep uphill. Hit spot on all 3 shots same as my practice earlier in the year. No issues with dope or my small primers in once fired LC brass. Just my experience.