Bcm mk12 mod 0

[Jake 6187]

What’s the best load for the bcm mk 12 I’ve watched several videos on all sorts of ammo but some of that makes me question how competent the shooter is does anyone have the bcm and hand load?

 

[NineHotel]

Discard the term "best" and focus on appropriate loads for the WS -

Best powder for Mk262 clone recipes - AR15.COM

Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.

www.ar15.com

 

[RyanScott]

Try BH 77 SMKs first.

 

[Jake 6187]

Discard the term "best" and focus on appropriate loads for the WS -

Best powder for Mk262 clone recipes - AR15.COM

Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.

www.ar15.com

Thanks for the link!

 

[Steel head]

23.somthing grains of 8208 and a 75/77 bullet.
Done.

25.something grains of W748 and a 68/69 grain bullet.
done.

 

[MontanaMan]

What’s the best load for the bcm mk 12 I’ve watched several videos on all sorts of ammo but some of that makes me question how competent the shooter is does anyone have the bcm and hand load?

Here is a link to a whole series of load testing to find comparable loads to duplicate the original Mk 12 Black Hill ammo.

Over the multi-part series, he tests a comprehensive array of powders & most of his results mirror my experiences with the same powders.

Other than the factory BH stuff, I've pretty much settled on 8208 as the most workable powder for my usage.

Watch & enjoy.................the series is long, but you can skim through to the results for each segment & not waste time on all his preliminary comments.

MM

MK-12 ammo cloning series Pt.1

 

[tlsmith22]

Try BH 77 SMKs first.

This. Shoots lights out in my MK12.

 

[Jake 6187]

23.somthing grains of 8208 and a 75/77 bullet.
Done.

25.something grains of W748 and a 68/69 grain bullet.
done.

Thank you have you ever tried any h335 with any loads I have a pile of that on the shelf

 

[Steel head]

Thank you have you ever tried any h335 with any loads I have a pile of that on the shelf

Try it with 55gn Nosler ballistic tips.
I can’t remember the grains but it was within book data, very accurate and hammered coyotes.

 

[Foxtrot2November]

I use my mk12 build with BCM SPR barrel for coyote and shooting range, and the 53gr V-max shoots 1/2" to 3/4" regularly. My grandpa and I are working up loads using H335 and 60gr TMKs

 

[Blitzy]

Almost a shame to shoot anything but mk262 out of that.

 

[Jsp556]

Discard the BCM barrel and replace it with one from a shop that has a rep for accurate barrels. JMO

 

[Foxtrot2November]

WOA?

 

[benchmstr]

In my recce and mk12 I only shoot factory federal match 73 grain bergers these days...haven't found any off the shelf that's done better.

Bench

 

[TheGerman]

Projectile​

Powder​

Charge​

Primer​

Case​

OGIVE COAL​

COAL​

Lands Offset​

Shoulder​

Aggregate Shoulder​

Sized Neck​

Loaded Diameter​

Neck Tension​

77g Sierra TMK​

8208XBR​

23.4​

CCI 400​

A/E Federal NATO​

1.8205​

​

Load to Mag​

1.454​

​

0.2440​

0.2465​

-0.0025​

This shoots .75-1 @ 2720 out of my 18 inch Douglas Mk12Mod1.

If I remember right, the charge is Max++, so be careful.

 

[Docsherm]

Discard the BCM barrel and replace it with one from a shop that has a rep for accurate barrels. JMO

So much win in this post.

 

[MontanaMan]

So much win in this post.

Well, I haven't heard of anyone building a precision rifle around a BCM barrel...........................

Might have missed something though.

MM

 

[Steel head]

Well, I haven't heard of anyone building a precision rifle around a BCM barrel...........................

Might have missed something though.

MM

I’ve known of a few.
one was pretty good but others were kinda MEH.
This is just their SS SPR barrels.

 

[Forgetful Coyote]

What do yall think of the 77gr TMK?

 

[TonyTheTiger]

What do yall think of the 77gr TMK?

Not as accurate as the SMK, doesn't have the BC of some other tipped bullets. So good, but not great.

 

[axarob44]

I have 2 Mk12 Douglas barreled rifles, and one Krieger barreled AR, and a friends Mk12 shoots this load sub moa. And the same load also will shoot Berger 77 OTM, 77 SMK and Lapua 77 Scenar-l all the same. Bergers seem to have the lowest SD's

XBR 8208 23.1 gr
BR4 primer or Fed205M
77gr Berger OTM at 1.760" CBTO

I usually use LC or Remington brass

 

[gac700]

BH77
Buy an AEM5 if you don’t own one already.