Chrono'ed Muzzle Velocities - 16" barrels

General Firearms Reloading & Ammunition
1

Looking for MVs that people have actually gotten with a chrono.
Either 55 grain or 62.
Want to get an idea of the average of actual measured velocities for purpose of a ballistics table.
Manufacturers list velocities but rarely list the barrel length.
They also likely chrono them on indoor ranges in controlled environments.
I know there is a chart floating around that lists them as 3,132fps for 55gr and 2,928fps for 62gr.
The sample size used was 3 five round groups from 3 rifles with same length barrels.
Just looking for more data to nail it down even more.
I don’t care if it was -4 or 104°F.
Don’t care if elevation was 3 feet above mean sea level or 7,000 above MSL.

Thanks,
Greg

ETA:Oh yeah, commercial loads only, either 1st run or remaned, no reloads.
Thanks again.

ETA 2:Yeah, I know, the velocities aren’t actually muzzle velocities, but you get the point.

2

Here are a couple of oldies to get you started - both factory fresh IMI:

IMI M193 in a 16" Bushy (Oct-98): 2,877 FPS Avg; (H = 2,900, L = ?)

IMI M855 in a 20" Colt (May-'96); 3,102 FPS Avg; (H = 3,144, L = 3,083)

I’m guessing you know there can be significant variations between different barrels and chronographs. I’m pretty sure these were over my PACT.

3

Yeah, I know, that’s why I am not worried about most variables.
I am looking for an average.
And I do mean average.

You’re showing 2,877 which is one of the lower I’ve seen.
I have seen up to 3,200 IIRC with most being closer to that than yours.
BUT, I do not know the conditions under which the others were taken so your “Dude really shooting and chronoing it” is actually more useful.

Thanks much and if you or anyone else has more, keep sharing,

Greg

4

PMC ball runs 2925 avg from my 16" ss Douglas. Did that for a dope chart to accompany the 77 gr one. 70 degree’s when I did that, sea level.

5

Thanks.

6

Here is some data from my 16" POF:

American Eagle XM193
temp 55F
alt 1700
12’ from muzzle
10 shots
low 3119
high 3221
average 3161 fps

PRVI PPM193
temp 65F
alt 1700
12’ from muzzle
10 shots
low 3017
high 3092
average 3058fps

PRVI PPM855
temp 65F
alt 1700
12’ from muzzle
10 shots
low 2913
high 3003
average 2946fps

Wolf MC .223 55gr FMJ
temp 65F
alt 1700
12’ from muzzle
10 shots
low 2938
high 3034
average 2984fps

7

Thank you, Sir.
Keep them coming.
Right now the average is about 3050.

8

Another: The latest batch of IMI M193 (IMI 09 head stamp) averaged 3,068 fps out of a 16" Noveske.

9

Colt 16" 1/7 twist
Lake City XM193
3169

Colt 1/9 twist
Lake City XM193
3147

5 shot averages, 88 degrees

10

LMT CQB MRP Piston 16"

American Eagle XM193, 10 shots, average 3051 fps

PRVI PPM855, 10 shots, average 2944fps

Wolf MC .223 55gr FMJ, 10 shots, average 2996fps

11

Cool, thanks guys! :smiley:

Current average is 3,058.