primers and signs of presure how to tell

[Clark]

From my range report 12-28-2008:

Ruger #1 7mm Rem Mag, 26" barrel, With vari X III E 1.75x6 x32, limbsaver recoil pad, wide leather sling, double bungie chord scope lens covers, Ruger rings, condom on muzzle = 10.0 pounds
175 gr Hornady spire point #2850 moly, 3.345", 67.5 gr Re22, Quickload predicts 3003 fps 62.3kpsi
1.14" 3 shot group at 50y
3009
2982
2969

When Quickload is predicting the velocity well, then I probably have the start pressure correct, and the pressure predictions are then consistent with the threshold of long brass life for the same design case head in other cartridges and rifles.

What does it all mean?
I am using 67.5 gr of Re22 with a 175 gr bullet, and getting low pressure.

 

[trueblue]

They all look fine to me.
You still have plenty of radius left on the edge of the primers. I see no evidence of an ejector mark on the brass. I assume from what I see that you had no stiff bolt or ejection problems. As far as cratering on the primers, some rifles crater more than others depending on the clearance of the firing pin and bolt face. But, I see no issues with ecessive cratering on this brass. What are the specs of your load ?
I could run it thru Quikload for you , but I see no pressure issues here.

 

[retiredcpo]

my max load was 63 gr of rl22
Im using winchester brass and win mag primmers
topped with 160 gr accubonds
the temp when I shot the last group was around 80 deg
I think they are fine but still more testing to be done
How temp sensitive is the RL 22 powder?

 

[Rimfire]

my max load was 63 gr of rl22
Im using winchester brass and win mag primmers
topped with 160 gr accubonds
the temp when I shot the last group was around 80 deg
I think they are fine but still more testing to be done
How temp sensitive is the RL 22 powder?

It's not temp sensitive if you are working loads in the summer. Just dont shoot max winter loads in the summer

 

[retiredcpo]

If i find a good load im happy with durning the summer how much affect will winter temps have on the rl22