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Molon
27 October 2015, 10:48
Observations on an Atypical Lot of Federal LE223T3

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The Federal 223 Remington Tactical 62 grain ammunition is loaded with a bonded soft-point bullet with a cannelure; the 62 grain TBBC. (All the better to shoot your auto-glass with, my dear!) There is a scant amount of lacquer sealant at the case mouth (mostly in the cannelure.) The primers are also sealed and crimped. As you can see from the picture above, the components come loaded in a shiny nickel plated Lake City case.


The 62 grain TBBC has a solid copper base that comprises approximately one third of the length of the bullet.





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When chronographed from a 20” Colt M16A2 barrel over an Oehler 35-P chronograph, this particular lot of LE223T3 produced a muzzle velocity of 2831 PFS. This muzzle velocity is approximately 140 FPS slower than the average of previous lots of LE223T3 that I’ve chrongraphed from the same barrel.


Previously to conducting accuracy testing of this particular lot of LE223T3, the single smallest 10-shot group of LE223T3 that I was able to obtain shooting from the bench at a distance of 100 yards was 2.13”.




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This particular lot of LE223T3 was accuracy (technically, precision) tested from one of my semi-automatic AR-15s with a 20” Lothar-Walther barrel that has a 223 Wylde chamber and a 1:8” twist.

Three 10-shot groups fired in a row from the bench at 100 yards had the following extreme spreads:

0.93”
1.10”
0.87”

for an average 10-shot group extreme spread of 0.97”. I over-layed the three 10-shot groups on each other using RSI Shooting Lab to form a 30-shot composite group. The mean radius of the 30-shot composite group is 0.32”.


The smallest 10-shot group . . .

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The 30-shot composite group . . .

https://app.box.com/shared/static/ygyeefou9hksuggsnlw3rho2bths345w.jpg



....

DeviantLogic
28 October 2015, 01:23
Impressive, and nice shooting.