.50DTC M2HB Barrel Test

[mrkubota]

M2HB .50DTC Conversion!

Got my new mfg. M2HB barrel chambered for .50DTC in today.
Couldn't wait to clean off all the cosmoline and install it into my M2HB.

A lot tighter fit than my old blaster barrel, but I finally got it headspaced and some dummy .50DTC 'forming' cartridges assembled and linked.
I left the OAL at 5.45 at first, but they still worked fine seated to 5.30 too.

Manually cycled them through the gun and they all fed, chambered and ejected perfectly.

I'll have to mod a spare cartridge stop and delinker for fire-formed DTC ammo tests.

Will get a chance to try 'em for real at this weekends shoot.

Should be fun!

http://www.daplane.com/50bmg/50dtc/m2hb_50dtc/

[Dan Wilson]

Okay, can anybody fill me in on the difference between regular .50 ball and .50DHTC? And why do it? They look just like regular .50 to me.

The moron explanation will work fine guys.

Thanks

Dan

[KABAR2]

Apparently it is a hybred 50 case dreamed up that is supposed to get around the Komifornica ban,the ban apparently is 50 bmg specific...........

http://serbu.com/50bmg/ca50.php

[franks71vw]

yup the dummmmies in kali said nothing in .500 so .510 is not .500 even though that round has never been used in a crime their go figure. I think they should ban steel mill cause you can build a ton of weapons from a sheet of steel...

[rugman59]

Damn! dont give em any ideas! :shock:

[mrkubota]

AB-50 only banned the further sale of any new RIFLES *CHAMBERED* for .50BMG. Anything .50 caliber or otherwise is unaffected.

All the components are the same between the DTC and BMG cartridges.
You simply shorten a BMG case 1/10" and full-lenght size it in a DTC die to move the shoulder down and change it's angle to 18*.
Load it up just as you would any BMG round and fire-form it in your DTC barrel to blow the case out to it's final shape.
It actually ends up with slightly more case capacity than BMG, but all the BMG loading data works just as well in DTC rounds.

The way that AB-50 is written, it really only regulates *rifles* defined as shoulder fired long guns, so technically even the M2HB should be legal still.

However, the CA DOJ being what it is, can't really be trusted to follow the letter of even their own laws, so I thought that working out a way to have a tested conversion available to new builders/buyers in CA would be a fun project.

I manufacture .50DTC ammo for the CA market, so having the side benefit of generating a lot of fire-formed DTC cases is a plus for me too! :50cal:

http://www.daplane.com/50bmg/50dtc/bmg_dtc_conv.jpg

[Dan Wilson]

yup the dummmmies in kali said nothing in .500 so .510 is not .500 even though that round has never been used in a crime their go figure. I think they should ban steel mill cause you can build a ton of weapons from a sheet of steel...

Sorry but that cant be done legally, anything exceeding .500 is a DD and requires the registration and other restrictions.

And thanks for the explanation guys, simple change for a stupid reason becuase of stupid people. Got It. :banghead:

Dan

[GUNRUNNER5150]

wow, weird

[KABAR2]

yup the dummmmies in kali said nothing in .500 so .510 is not .500 even though that round has never been used in a crime their go figure. I think they should ban steel mill cause you can build a ton of weapons from a sheet of steel...

Sorry but that cant be done legally, anything exceeding .500 is a DD and requires the registration and other restrictions.

And thanks for the explanation guys, simple change for a stupid reason becuase of stupid people. Got It. :banghead:

Dan

Actually the .50Bng round uses the same bullet dia. the lands are .500 with the grooves slightly larger so there is a slight squeeze bore effect. So it does not fall under the DD classification.

http://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/50_bmg_12.7x99.PNG/255px-50_bmg_12.7x99.PNG

[dutigaf]

shit!! i thought it was that 37mm thing that was the DD limit??

now im confused again.. someone help out the redneck.

[KABAR2]

anything over 50 cal is classed as a DD, 55 cal. Boyes AT rifle is a DD etc.

[Dan Wilson]

If I remember the wording in the regs right it specifies anything with a bore exceeding half an inch .500 (excluding shotguns) is a destructive device. Key word is BORE otherwise a 50BMG would be out of there with a projectile size of what .511 or so ?

Dan

[mrkubota]

There are 'sporting' exemptions for some cartridges too.
JDJ got one for their 14.5x99 wildcat:
http://www.sskindustries.com/14_5.htm

and oddly enough, the DD limit in California is .60 cal.

[dutigaf]

too many fuckin rules.

[Dan Wilson]

too many fuckin rules.

Well if we had a country that honored its Constitution there wouldn't be any of these screwed up rules.

Dan

[KABAR2]

too many fuckin rules.

Well if we had a country that honored its Constitution there wouldn't be any of these screwed up rules.

Dan

SOMEBODY SAY AMEM!

[twin60s]

AMEN!!!

[mrkubota]

M2HB .50DTC Conversion!

Got my new mfg. M2HB barrel chambered for .50DTC in today.
Couldn't wait to clean off all the cosmoline and install it into my M2HB.

A lot tighter fit than my old blaster barrel, but I finally got it headspaced and some dummy .50DTC 'forming' cartridges assembled and linked.
I left the OAL at 5.45 at first, but they still worked fine seated to 5.30 too.

Manually cycled them through the gun and they all fed, chambered and ejected perfectly.

I'll have to mod a spare cartridge stop and delinker for fire-formed DTC ammo tests.

Will get a chance to try 'em for real at this weekends shoot.

Should be fun!

http://www.daplane.com/50bmg/50dtc/m2hb_50dtc/


Finally got the video digitized of the first 10 round belt (CA limit) of .50DTC ammo through the new conversion barrel. All went off without a hitch. A nice option to have when shooting the M2 in the PRK.

right-click, save target as:

http://www.daplane.com/50BMG/video/m2hb_dtc_test.wmv

[dotchoy]

Hey what does the DTC stand for. Looking forward to getting my brass from you as well Mr. Kubota :banana:

[Pvt. Joker]

Hey what does the DTC stand for.:banana:

"Damn The Californicators"???

"Dig This, California"???

:coffee: :bow:

[mrkubota]

:mrgreen:
'DTC' is actually representative of the cartridge designer, Eric Danis.
His company is called DanTeC.

He's a French national, and came up with the variation when the French government banned the use of 'military' cartridges by civilians there.

When CA restricted the .50BMG, EDM went looking for a compliant variation and adopted it as well.
Due to a typo on the original reamer spec, there is a slight difference between the European (DTC-Europ) and EDM (DTC-EDM) versions. EDM's has a sharper radius at the neck to shoulder interface.
The .50DTC-EDM version is by far the most popular chambering among the vendors selling them. EDM Arms, Serbu, SafetyHarbor, StateArms, Bohica. (Manson reamer spec)

SpiderFirearms, BluegrassArmory, some custom shops, and the first 12 Serbu DTC guns use the DTC-Europ (JGS reamer) spec.

Forming ammo works in either chamber. Fire-formed cases sized with the DTC-EDM die will work in either chamber. DTC-Europ dies are a couple thousandths tighter at the case head (at least in the example I have)

CH4D.com makes die sets for both specs. I have some custom die sets coming in July being made by Lee for their Classic Cast press.

[dotchoy]

Hey what does the DTC stand for.:banana:

"Damn The Californicators"???

"Dig This, California"???

:coffee: :bow:

"Democrates Tormenting Californians" :headbang:

[Kali Komrade]

Don't Tell Clinton.... :mrgreen: