[Zak Smith]

Just got this one set up, working on load development:

http://apollo.demigod.org/~zak/DigiCam/GA-MCBROS-50BMG/small/126_2636_img.jpg [ link to larger image ] (http://apollo.demigod.org/~zak/DigiCam/GA-MCBROS-50BMG/?medium=126_2636_img.jpg)

http://apollo.demigod.org/~zak/DigiCam/GA-MCBROS-50BMG/small/126_2638_img.jpg [ link to larger image ] (http://apollo.demigod.org/~zak/DigiCam/GA-MCBROS-50BMG/?medium=126_2638_img.jpg)

more: http://apollo.demigod.org/~zak/DigiCam/GA-MCBROS-50BMG/

[Third_Rail]

Nice! How smooth is the action?

[Zak Smith]

It's smooth and tight. Chamber is minimum, so there is a little resistance closing even on an empty FL resized case. I'm still working up a load, but in testing I've got 0.25MOA 3-shot groups at 200 meters (that's 0.5" center to center).

-z

[CRridermike]

what is it? caliber?

[Zak Smith]

It's a 50BMG rifle based on a McMillan repeater action (5-round magazine) and stock, built by GA Precision. Barrel is 29". Rings are Badger Ordnance, scope is a Nightforce 5.5-22x56mm NXS mildot. The gun weighs in the mid 30 lbs.

The standard target load is a 750gr AMAX loaded with 215 - 230gr of H50BMG powder and a cartridge over-all length of about 5.5" for a muzzle velocity of around 2625 - 2700fps. For "fun" and plinking, mil-surp AP, API, APIT, tracers, and incendiary bullets can be loaded.

-z

[WhiteKnight]

How do you like the NightForce?

[Zak Smith]

I like the Nightforce better than a similar Leupold M1.

-z

[Schuey2002]

Zak, how's the recoil on that beauty?? In other words, how many rounds can you put downrange before your shoulder starts to protest? :)

[Zak Smith]

Schuey2002,

I sometimes get bruised when I shoot magnum slugs through my Benelli. The 50's recoil is less painful than those. Remember, it's a 30-some lb gun, with a decent muzzle brake, and a recoil pad over an inch thick. I could shoot 50 rounds a day no problem.. the question is, can I afford to? :eek:

-z

[Stoney]

A 50 BMG, man I love this country.:D

[Warbow]

Holy Moses! That's a sweet rifle.

A .50 BMG rifle is on my list of things to get when I win the lottery. :D

[strambo]

Very nice... ;) Only .25 MOA? I thought those McMillan .50's were supposed to be accurate?:confused: :uhoh:























-kidding of course, I couldn't shoot a laser that well at 200M.:D

[Zak Smith]

One good 3-shot group doesn't an accurate rifle make...

-z

[Zak Smith]

Finally got a good COAL gauge, measured distance from bolt face to lands, and got my OAL figured out: 5.640" for the 750gr AMAX. I'm currently at 222gr H50BMG for about 2530fps; I'll work it up to about 2600fps. I'm getting pretty consistent 0.5 - 0.65 MOA three groups at 220 yards. I think the gun can do 5-shot groups of that size, but I usually pull one out to about 1MOA.

http://apollo.demigod.org/~zak/DigiCam/GA-MCBROS-50BMG/small/126_2644_img.jpg [ link to larger image ] (http://apollo.demigod.org/~zak/DigiCam/GA-MCBROS-50BMG/?medium=126_2644_img.jpg)
http://apollo.demigod.org/~zak/DigiCam/GA-MCBROS-50BMG/small/126_2643_img.jpg [ link to larger image ] (http://apollo.demigod.org/~zak/DigiCam/GA-MCBROS-50BMG/?medium=126_2643_img.jpg)

[Correia]

Zak, you really do have some of the neatest toys. :)

[PieThatCorner]

Zak - what's the finish on that barrel? Is it parkerized or coated? That's a great looking muzzle break, by the way... ah Hell, that's an impressive looking setup overall!

[TheDutchman]

Zak tell us more about your 6.8spc AR

[Zak Smith]

PTC,

I've been told it's teflon over parkerization on the whole rifle.

The Dutchman,

Maybe let's start another thread for the 6.8SPC, or use this one: 6.8 SPC PRI upper built by MSTN (http://www.thehighroad.org/showthread.php?s=&threadid=73379)

-z