Factory Ammo Anomaly? - Chrony Tested

[Fall Guy]

Just got back from the range with my new chrony.

I was trying to get the hang of things (being very cautious) and was shooting some factory Remington .223. A couple of shots really caught my attention.

I shot only one 10 shot group. The average velocity was around 3150 fps for 8 shots but two of them were around 875 fps. I didn't notice anything significantly different while shooting.

The unit worked fine on the other calibers I tested from .22 to my handloads in 3 calibers.

Is this an anomaly or has anybody else seen the same?

Or am I doing something wrong?

 

[tiriaq]

For whatever reason, the Chrony didn't give a correct reading. Don't worry about it. Highly unlikely that was the actual velocity.

 

[Cocked&Locked]

how close was the chrony to the muzzle of your rifle? Odds are it picked up the muzzle blast (flash/smoke) as it was slowing down.

 

[Fall Guy]

It was the full length of the cable - 15 ft.

 

[agilent_one]

For whatever reason, the Chrony didn't give a correct reading. Don't worry about it. Highly unlikely that was the actual velocity.

+1.

I've chrony'd a 170gr 30-30 at >3500 ft/s.

May want to play with the height of the sun shades, or remove them depending on the lighting.

Also, make sure your chrony is COMPLETELY unfolded.

 

[todbartell]

add more powder if you're only getting 875 fps hahaa
​

 

[prosper]

if it was subsonic, you'd have no doubt whatsoever without needing a chrony. It's sound different - be MUCH quieter, and almost zero recoil (like a 22lr)

 

[NavyShooter]

Chrony hiccup'ed without a doubt.

Mine does that sometimes too.

NS