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9/22/2017 12:11:25 AM
Posted: 11/13/2002 10:19:29 AM EDT
[Last Edit: 11/13/2002 10:24:22 AM EDT by tatjana]
Conditions:

~2600 feet elevation.
68 degrees F.
24% Humidity
Pressure: 30.10 In/Hg
No wind.

Weapon:

Postban Bushmaster 16" Shorty A3 HBAR with 1:9 twist topped with ARMS #19ACOG and 3x24 Compact ACOG (amber crosshair).

Procedure:

Weapon was zeroed at 50 meters then sample fired at 200 meters with good results. (All rounds fell within 3.5" of Point of Aim).

5 shot groups were fired at the shooters pace (slow) from a rest supported prone position at 200 meters. Results were measured from the outside frontier of holes in paper.

One group of Q3131a was fired. One group of LC'00 was fired. A follow-up group of LC'00 was fired.

Results:

Q3131a 55 grain FMJ (WCC'00) (Lot SD10):
4.55"

Lake City 2000 (LC'00) (Lot 1):
5.75"

Lake City 2000 (LC'00) (Lot 1):
6.25"
Link Posted: 11/15/2002 5:50:09 AM EDT
Forgot to mention: Barrel was allowed to cool between groups and before the first group...
Link Posted: 11/15/2002 8:43:58 PM EDT
tatjana

Thanks for the info, by any chance did you chrono, or do you have the chrono info for the Q3131A?

Thanks again
Link Posted: 11/15/2002 8:56:42 PM EDT
Know of any good sources online for the Q3131a ?
Do you think fragmentation using the Q3131a would be better than LC?
Link Posted: 11/16/2002 6:47:25 AM EDT
Your reports make a good standard for comparison, and are appreciated.

If you take request.
How about a similar range report using an AR-15 with standard factory sights,and a distance from 200 to 400 meter range.
Just so us not so well practiced can see how we are doing.

Thanks for the info.
Link Posted: 11/16/2002 8:26:42 AM EDT
Every lot of Q3131, Q3131A, LC XM193, SA M1A3, and SA M1A4 I have tested has chronographed to US milspec for M193 Ball and gelatin tests I've seen on all of them indicate the same fragmentation effects.

"The average velocity of the sample cartridges ... shall be 3250 feet per second (ft/sec) plus or minus 40 ft/sec, at 15 feet from the muzzle of the weapon. The standard deviation of the velocities shall not exceed 40 ft/sec." [MIL-C-9963D para 3.9]

There's nothing to choose from between this ammo other than the group size from your rifle when fired from a bench rest.

"The average of the mean radii of all targets of the sample cartridges fired at 200 yards, shall not exceed 2.00 inches." [MIL-C-9963D para 3.7]

-- Chuck
Link Posted: 11/16/2002 9:31:47 AM EDT
Chuck,

Outstanding!! Just what I was looking for, thanks.
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