Alot of good advice and info here once you get past the origional zombies remarks, lol.
What i find funny in these posts is the mention of "Cost".....guys..... they're 50 bmg's...lol . What did you expect? Buying them is the easy part, its feeding the pigs and the cost of load developement that hurts.
We need more pics here and peoples loading notes to help others save time and money.
I've not loaded with US869 myself but a friend has and likes it. I've used the H50BMG and I found it dirty, expensive and had a sharper recoil.(there is enough already with a 50)
I used a fair bit of H5010 and liked it.
The 50 I had is long gone now but I still have some of the materials I was loading with and would consider buying another one day.
For brass cleaning I've never done the water wash routine but did use alot of brass from surplus ammo i'd fired off.
After returning from a machine gun shoot in Kentucky i'd bought a solution you dilute with water and soak the brass in. This tends to colour them so after that i'd tumble them in corn cob media. Afterwards inspect them and remove any offending media.
Then use a primer pocket reamer to clear up the ugly factory pocked, then with a small wire brush (round) in a cordless polish the inside of the next and used ultra fine steel wool to polish the outsides. Obviously and brass with the double primer hole were given away as gifts to people for key chains etc,
I don't have my loading notes handy from what worked for me but I remember while a buddy was using heavy loads like posted before I was using much lighter ones and getting very nice groups at 100 and predictable accuracy at 1000.
This pic is decieving. only 6 rounds are in the center hole, 2 flyers are from me flinching when a black power rifle next to me went off as i was about to shoot.
M.