Did a hasty chrono of Mk 262 mod 1 out of a 14.5" 416...
2505fps average for 10 rounds.
Curiously enough, my AB range card data for the slower 77gr, perfectly matched my BDC cam for M855 green tip on my optic. Looks like that optic will stay married to that gun; going out tomorrow with steel to confirm...
It seems like you prefer the 14.5" over the 10" 416 based on what you have written recently. Is that a correct assumption? Is it because of velocity or any particular reason? Do you keep a suppressor on the rifle or mainly use a rifle without being suppressed? I actually enjoy reading and learning from your post.
It's mostly a ballistics issue. Even if NFA were repealed today and HK USA started cranking out 10.4, 11.5, 14, 16, 20" full-on 416 spec copies tomorrow, I probably roll mostly with a couple 14.5 or 16 guns, and maybe have shorty for grins. For what I do with the guns, the ammo I shoot out of it at the distances I have...14.5" makes more sense for me given the available options at this point.
Ok, so everything worked out pretty well. After double-checking my BDC, I noted it was in meters; everything I did today was ranged off of yards but it worked out fine.
Temps started off in the high 40's, low 50's
Wind was straight out of the East/NE (at 80 degrees from position)from 10-14mph with a few odd gusts 18-20mph a few times (one is illustrated pretty well)
I set 2/3 scale IPSC steel (12x20") at 200, 300, and 400y and later moved my firing point back 50y to get on at 250, 350, and 450y
Since the whole point of the BDC is efficiency, wind holds were pure guess work since I didn't check them with the Kestrel until after firing.
40 rounds fired, 40 hits on steel
With BDC dialed, 200y was spot-on. I was playing with about wind hold on the right 1/3rd of the target (straight down from the right edge of the head). After confirmation, all subsequent 200y shots were on the 4x4" head section.
250y Point of aim was above the water mark, below the head
Wind hold for 300/350y was perfect with the exception of one strong gust that came up while I was at 350y. My firing point at the 250,350,450 was blocked from the wind so I had to base my wind call off what the trees behind my position were doing...mostly by sound. Wind hold was about 0.9-1.1 mils
Pretty happy with this target
I have no idea which hits are which. Pretty happy with vertical dispersion compared to the water mark. My 1.6ish mil hold was apparently plenty aggressive for that distance. With limited magnification, I had trouble tracking my hits save for the dark grouping below, right of the water mark.
Pretty good day with this setup. Given how much of a pain in the ass it was to set up these targets in a chiseled (plowed) field, I didn't push farther. With today's wind, 500y under today's conditions would be starting to push the limits if trying to maintain a high hit probability. On a calmer day with a full-size IPSC, I'm sure 600/650 (650m is the max BDC) wouldn't be hard, but I'm very pleased with the above considering it was all done without electronics.
Brother, you never cease to amaze me. that is impressive, and it is good to hear the hold offs work for your gun/glass combo.
USP Tactical .45acp
HK 416 10.5" upper
HK45T (OD Green)
Nice placement--- 1M = 1.09361YDS!!!
Is that the field from "Children of the Corn"?