I was wondering, since the recent batch of this powder is burning faster that it should, if it was causing short stroking issues in the semis? I have a good amount of brass to load with 867 and have a semi on the radar.  I sure don't want to load a bunch and then it short strokes in my Serbu.

I've not loaded 867, but it can't be HUGELY different than 860 (and 5010), a bit quicker, sure...

I have loaded and shot a bunch of rounds with my Serbu 50A,
FWIW, from 190 grains to over 230 of powder, the gun strokes just fine.

BAM! BAM! BAM! BAM! BAM! BAM! BAM! BAM! BAM! BAM!

RULE OF THUMB for 50cal powders "if you're unsure, start at 210".

218 grains of wc 867 with a 650 grain m-33 ball gives me about 2550 fps out of a 26' Serbu 50A.    

From an old post of mine.


All loads were:

Brass trimmed to 3.90, primer pockets cleaned and sized. Mouth chamfered inside and out.
cci 50 bmg primers
Weidners surplus powder WC867
M33 647 grain ball cleaned and resized to .510
O.A.L. was 5.42 ( off top of my head, I am at work and forgot my load data book)
I know that I set them at the same length as the survivalops rounds.

First set was 210 grains powder

2468
2423
2454
2448
2471
average is 2453

Second set was 215 Grains powder

2560
2503
2460
2460
one failed to read on chrono.

average is 2495

Last was 220 Grains powder

2595
2578
2611
two failed to read on chrono.

average is 2595

Pressure Observations.

None of the brass showed pressure signs.

The 220 grain rounds had a faint flattening of the primer around the strike area. But nothing alarming, the primers were still round on the edges, just as they were when new.

Thanks guys...that helps a bunch.....even with my AR-50 loads.

I run the same loads thru my Barrett 82A1 with no issues.(We are loading identical rounds except for the powder charge,if you remember)

For some reason,I go thru more ammo with the semi..............


Congrats on the semi-make sure you post up a range report!