77 GR Nos, clones, accuracy, blah...

[2ac]

What trigger you using?

Geissele SSA-E, the rifle is very capable of sub moa..
IMG_3244.jpg

[LMT/556]

In my 16" PRI, 24.1 grn TAC pushing a Nosler 77 w/cann @~2650 = BH 5.56 77 SMK (retail MK262). In my experience ammo of this type is MOAish...

[2ac]

In my 16" PRI, 24.1 grn TAC pushing a Nosler 77 w/cann @~2650 = BH 5.56 77 SMK (retail MK262). In my experience ammo of this type is MOAish...

That's what I'm beginning to finally settle on. I'd still like to try some actual MK 262 though, as I've read of excellent results.

[LMT/556]

FWIW that same load in my Centurion 16" recce clocks @~ 2750.

[2ac]

I'll have to dig my TAC numbers out, but at around 2700 fps, it was around moa.. nothing to brag about though.

[LMT/556]

That load (MK262/clones) sacrifices accuracy for terminal/long range performance to some degree IMO.

[bfk4lyfe]

Is ~2700 FPS out of a 16" barrel about average for mk262 variants?

[LMT/556]

More like 2650 with typical 5.56 chambers.

[2ac]

In my 16" PRI, 24.1 grn TAC pushing a Nosler 77 w/cann @~2650 = BH 5.56 77 SMK (retail MK262). In my experience ammo of this type is MOAish...

At 24.1 GR of TAC, and a 77 GR CC, I'm averaging around 2636. And that's from an 18" barrel. I need to push 24.6 GR to average 2700..
I can't find any old targets, maybe I'll run a few more loads. And now that I have a can, results may very.

[LMT/556]

I spoke with a ramshot guy. The 2 1lb containers I have are energetic, ~ +1%. The next 8lb lot is -4% so if your 24.1 is slower it could be from a less energetic lot. Load to velocity. An 18" should probably be ~2750 but a more accurate load will likely be less. These loads (~MK262) sacrifice accuracy for performance, plus loading this hot is hard on brass...