This is some data I found, there are lots of other examples.
The best standard deviation on this 22lr ammo selection was around 7fps. The velocity was 1066 = 0.65%. The worst was 1.43%. The 17hmr that varmintAl tested equals 1.32%. So yeah, the fact that CCI makes all the ammo is a problem, but let's be honest, its not THAT bad for factory rimfire ammo. Then consider that 22lr has been around for a lot longer than 17hmr and there is competition in the 22lr market.
My cheapo Savage 17hmr will *on average* shoot 1MOA at 100 yards or better across multiple boxes of ammo. That's better than a lot of AR's with NATO ammo.
Custom Ruger Charger, 10" KIDD Bull Barrel
Custom Ruger 10/22T, 18" KIDD Lightweight Barrel
Custom Ruger-Nordic 10/22, 20" KIDD Bull Barrel
Custom Ruger 77/22, 20" Clark Custom Guns Bull Barrel
10" Ruger Charger (KIDD Barrel)
40gr. SK Standard Velocity Hollow Point
Date = 4-17-12
Temperature = 61 degrees
Average Velocity : 986 FPS
Extreme Spread : 25
Standard Deviation : 6.93
10" Ruger Charger (KIDD Barrel)
40gr. Wolf Match Target
Date = 4-17-12
Temperature = 61 degrees
Average Velocity : 939 FPS
Extreme Spread : 135
Standard Deviation : 13.49
18" Ruger 10/22T (KIDD Barrel)
40gr. SK Standard Velocity Hollow Point
Date = 4-17-12
Temperature = 61 degrees
Average Velocity : 1066 FPS
Extreme Spread : 43
Standard Deviation : 6.93
18" Ruger 10/22T (KIDD Barrel)
40gr. Wolf Match Target
Date = 4-17-12
Temperature = 61 degrees
Average Velocity : 1025 FPS
Extreme Spread : 79
Standard Deviation : 10.44
20" Ruger - Nordic 10/22 (KIDD Barrel)
40gr. SK Standard Velocity Hollow Point
Date = 4-17-12
Temperature = 61 degrees
Average Velocity : 1018 FPS
Extreme Spread : 49
Standard Deviation : 8.37
20" Ruger - Nordic 10/22 (KIDD Barrel)
40gr. Wolf Match Target
Date = 4-17-12
Temperature = 61 degrees
Average Velocity : 1002 FPS
Extreme Spread : 47
Standard Deviation : 9.85
20" Ruger 77/22 (Clark Barrel)
40gr. SK Standard Velocity Hollow Point
Date = 4-17-12
Temperature = 61 degrees
Average Velocity : 1014 FPS
Extreme Spread : 29
Standard Deviation : 7.28
20" Ruger 77/22 (Clark Barrel)
40gr. Wolf Match Target
Date = 4-17-12
Temperature = 61 degrees
Average Velocity : 1003 FPS
Extreme Spread : 67
Standard Deviation : 10.58
The best standard deviation on this 22lr ammo selection was around 7fps. The velocity was 1066 = 0.65%. The worst was 1.43%. The 17hmr that varmintAl tested equals 1.32%. So yeah, the fact that CCI makes all the ammo is a problem, but let's be honest, its not THAT bad for factory rimfire ammo. Then consider that 22lr has been around for a lot longer than 17hmr and there is competition in the 22lr market.
My cheapo Savage 17hmr will *on average* shoot 1MOA at 100 yards or better across multiple boxes of ammo. That's better than a lot of AR's with NATO ammo.