Quote History Quoted:
The Magtech SMK will outshoot 99% of us, myself certainly included. It's a laser beam.
With that said, I use the IMI loading since I know it's loaded quite hot. MK262 is my HD round so I prefer to have that extra velocity buffer to ensure the round can frag out of a 10" barrel. If I recall, bluefalcon got 2400+ fps out of his 10" with the IMI loading.
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@135Patriots... just an FWIW... my data from a 16" and 20" ... from here..
https://www.ar15.com/forums/ar-15/Various-Chronograph-results-16-Middie-and-20-Rifle--223-5-56/16-676005/
And @eagle_19er has great data for shorter barrels here...
https://www.ar15.com/forums/AR-15/Suppressed-5-56-SBR-Velocity-Tests-41-Factory-Loads-from-10-5-11-5-12-5-and-14-5-ALL-DONE-/16-714088/
Atlanta Arms 77gr TMK , AMU.....................................................................
Beck Ammo. 5.56 77gr SMK ...............................................Av. 2469, ES 34.....................Av. 2734, ES 8...........
Black Hills 77gr 5.56 OTM .........LC 14 ( NATO Cross )............Av. 2592 , ES 21................Av. 2675 , ES 82..............Very accurate
Black Hills 77gr 5.56 TMK .........WCC 14 ( NATO Cross )...........Av. 2636 , ES 54................Av. 2753 , ES 63..............Outstanding Accuracy.
CBC 77gr 5.56.............................5.56 CBC 14..........................Av. 2577, ES 60..................Av. 2752, ES 75
CBC 77gr 5.56 PR 844 SMK ......5.56 CBC 12..........................Av. 2620 , ES 36.................Av. 2729 , ES 34...........These last two are labeled with different powders.
CBC 77gr 5.56 WC732 SMK ......5.56 CBC 14..........................Av. 2640 , ES 52.................Av. 2712 , ES 50............
Creedmoor .223 77gr TMK.............................................................................
Creedmoor .223 77gr OTM.............................................................................
Corbon 77gr .223 MPR..................................................................................
Federal 77gr 5.56 "FC262".................................................................................
FGMM 77gr .223 SMK FGMM....F C 223 REM..........................Av. 2340 , ES 25................Av. 2411 , ES 33.............. Very good accuracy
Fiocchi 77gr .223 SMK ..............G.F.L. 223 REM......................Av. 2390 , ES 96................Av. 2488 , ES 53............. about average accuracy for 77gr
IMI 77gr 5.56 OTM..................IMI 13 variety of 2 digits.........Av. 2726 , ES 39..................Av. 2810 , ES 41........... Not the most accurate, but certainly a good value.
Norma 77gr .223 TAC ...............norma 223 REM....................Av. 2430 , ES 75...................Av. 2550 , ES 68...........Average 77gr accuracy
Nosler 77gr.223 CC...................NOSLER 223 REM................Av. 2440 , ES 28...................Av. 2569 , ES 36.......... I need more trigger time with this ammo
PMC XTAC 77gr .223 SMK .......PMC 223 REM........................Av. 2350 , ES 62................Av. 2427 , ES 31...............
Rem. 77gr .223 SMK .................R-P 223 REM..........................Av. 2468 , ES 73.................Av. 2563 , ES 39.............
Sig Sauer 77gr SMK .223..................................................................................
Winc. 77gr 5.56.........................WCC 14 5.56MM....................Av 2566... ES 36..................Av 2676.... ES 20.............Decent speed, but there is faster.
Winc. 77gr Match 5.56 _ _ _ .... WCC 14 5.56 MM...................Av. 2364 , ES 47................Av. 2468 , ES 54..............For a 5.56 round, this is very low velocity.