I picked up around 350 rounds of Malaysian M193 a couple of weeks ago, and I finally got around to chronographing the load through my 16" Rock River M4gery. I also shot the M193 through a 22" rifle. Here are the results:
Barrel Length: 16.5"
Chrono 12 feet from muzzle
Malaysian M193, '84 Head stamp (16.5" bbl)
3074 3086 3065 3058
Malaysian M193, '84 Head stamp (22" bbl)
3276 3292 3252
Accuracy was around 1.75-2" @ 100 yards
3037 2987 3044
South African PMP .223
2801 2766 2812
2666 2666 2661
The Malysian M193 performed about as expected, as was fairly accurate. It was also close to the Q3131, but velocites were more consistent. The PMP was quite a bit slower, but has been reasonably accurate. The big surprise was the Wolf Polymer. I knew the Wolf would be slower, but I had no idea the velocities would be as consistent as they were. Granted, I only fired three rounds, but I was running out of daylight. However, a standard deviation of only 2.8 is excellent for any ammo!
I also clocked a little .308 ammo through my 20" Savage heavy barrel.
LC Ball, '91 headstamp
2569 2583 2583
Remington 150gr Core-Lokt factory
2588 2677 2661
The Lake City turned out to be decent ammo, averaging around 2" @ 100 yards and better than minute-of-bad guy @ 300 yards. Never shot for actual groups at 300 yards, just a chest sized steel plate we have hanging at the distance. The funny thing was, I could shoot the gun from the prone position, and still be able to get the scope back on target (after recoil) before the bullet hit the plate!
The .308 LC Ball seems to be a bit on the slow side. I thought that M80 Ball was supposed to be in the neighborhood of 2700 ft/sec.
Not too sure about the velocity, as this is the first I've chrono'd. I assume its 150gr bullets, but it could be heavier stuff.
Thanks for posting your results.
Good data. Can you chrono AE223 (55g and 62g) next time?
No headstamp on the "Winchester Q3131"? Is that Q3131A or Q3131 no a?
No, its all marked "Q3131" on the box. I actually have some Q3131A, so I'll clock it the next time I go. I'll also try some more Wolf, and see if the SD stays in the single digits (which I doubt). I don't have any AE, but I'll look around for some locally to try.
Oh, I did get a chance to shoot some M855 through another 16" AR, and it all averaged in the 2900-2950fps range. I didn't write the velocities down, so I can't actually give an average or SD for the load. I spent most of the day playing with my .308, but I will get back to the 5.56 stuff.
Jason, I sent Hayseed some numbers on the AE stuff.
Are the Q loads the new production stuff?
Not sure, as I've had this the Q3131 for at least a year now. I'll check the boxes and see if I can find a date stamp.
Have you ever chrono'd georgia arms canned heat or the WWB?