NM AR-15 69 SMK Load ?

[Weez556]

I still have about 2000 69gr SMK's I had worked up to and used Varget 24.5 grs. Does anybody know what the FPS. on this load is around.
I want to try working and testing Reloader 15 for the same 69gr SMK I see most guys ran around 24.5 - 25 grs. I know start low and work up but any idea of FPS on 24.5- 25 of RL 15 ? Thanks

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[Larry Gibson]

25.5 gr Varget (my match load with the 69 gr MK) runs 2745 fps (20 shot string) out of my Colt Comp with 9" twist. 24.5 gr will probably be 100+ fps or so slower.

Larry Gibson

[MEHavey]

My 20"HBAR 1/9: 68gr HornadyHPBT/Varget/24.4/BR4/WWCase*/OAL2.265" chronographs at 2,622fps. What barrel length will your (Weez556) 69SMK/Varget/24.5gr loads run out of?

For reference, QUICKLOAD predicts the exact same velocity for 24.5gr RL-15 as 24.5gr Varget, all other conditions being the same, and ~5% lower pressure.



*(31.5gr Water -- Mil/RP cases would result in faster/higher pressures)

[snell]

I have a RRA NM with a 1:7 Kreiger barrel. I use:

25 gr Varget
CCI sr primers
WW brass
69 SMK loaded mag length.

My last 10 shot string over the chrony @ 10 ft follows:

Lo 2875
Hi 2923
Av 2897
Es 47.93
Sd 17.49

The hi one @ 2923 may well have been an anomoly as the other three shots above 2900 were within 16 fps of that threshold. Still it should give you an idea.

Good luck


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