rifle stats:
Savage Barrel take off, seems to be a savage target contour or a varmint contour at least, 1:12 Twist, 22'', shot count unknown. I know the bullet will do better on a 10 twist but until the bonus or irs return come home...
boyds varmint stock, action bedded, tang floating, target recoil lug, accutrigger set to 1 lbs.

Shells:
Remington brass shot no more than 3 times. all have been trimmed to 1.902, neck sized, rcbs competition die, coal 2.102, WLR primer, Nosler Bonded Bullets 64 Grain Spitzer Solid Base.

Reloading
Each load has been manually thrown, each double check with 2 rcbs scales (digital 750 and a beam 505). Im seating .010" from the lands.

A couple of years ago i worked a load for this 22-250 using this same bullet, speed was good (3400+fps), accuracy was acceptable for hunting inside 150 yards BUT I had occasional flyers AND I would have blown primers in occasion which the last made me retire the load.

This year I want to bring the gun back and I am using varget instead of rl-17. I loaded 2 sets of 8 shells starting at 23 grs, used 3 grs increments up to 25.1 grs. I threw each similar load at the same time. Shot them today, this is what I got.

First set:


Chrono stats:
Hi Vel: 2989
Low Vel: 2726
Ave Vel: 2869
Ext Spread: 263
Std Dev: 84

Velocity
2726
2836
2855
2855
2976
2830
2886
2989

I found the speed of shot 4, 5, and 6 a bit disconcerting as it is not what i would have expected and wonder what made those speeds fluctuate like that.

Second set:


Chrono stats:
Hi Vel: 2917
Low Vel: 2688
Ave Vel: 2803
Ext Spread: 229
Std Dev: 71

Velocity Power Factor
2688
2789
2743
2789
2818
2812
2873
2917

although the shots here seem to be a bit out of order too, i would have expected an ascendant speed, not these fluctuations...

I generally set a camera to record the impact order. I forgot to bring my camera and had to use my phone. someone text me while I was going to be ready to start shooting the second set and the recording stopped so I have no idea which bullet is which but they seem to have a common node as you can see similar impacts of shot 3 and 8, however, since I have no video I can correlate those same impacts on set 2 to their appropriate load. I will try to shoot another set on Friday...

Everything that hit 2900+ fps is starting to show cratering on the primers which for me is a bit disheartening since I was hoping to keep the speed up to 3200 fps.
See shell number 5 and 8 on the top row and shell number 8 at lower row.


Here is a close up to both number 8:


Hodgon reloading data it says that 29.5 grs is starting load for both 63 and 70 gr bullets, max is 34 grs for the 63 gr and 32 is the max for the 70 grain.
Nosler reloading data does not have Varget included for this bullet, it does have varget for the 62 grain and it is starting at the 30 grs.

So I think I should not push past the 25.1 due to the cratering on the primer but I want to gain more speed. I guess that will mean using another powder but now i wonder if those other powders are shooting faster then wouldnt those also show the same signs of pressure? I bought about 5 cans of varget.... sight....

I will recheck my head spacing again but I dont think that is a problem. Im about to change the brass and primer but not sure those could cause those numbers or let me shot a bit hotter... I have some Hornady brass still in the box...