50 BMG IMP

24 April 2003, 09:39

Rock8296

50 BMG IMP

Could a 50 BMG case blown out to have straight walls and a sharp shoulder, as most 50's as single shot it wouldnt matter much, could or would this be feasible?

Rock

24 April 2003, 09:45

Robgunbuilder

It's been done and you can get another 150 fps out of it. Of course you'll be paying $250 for a set of dies and $300 for a reamer. However, it's legal I believe only in FCSA heavy gun and unlimited class competion. I believe the rules specify a .50BMG case for light gun. They check!.-Rob

24 April 2003, 18:42

<KBGuns>

How about blowing it out with strait walls and a sharp sholder, but reduce case lenth so that the power capacity is the same or slightly smaller. Similar to a 7.62x51mm scalled up, instead of the 30-06.

.508 Whinchester?

Kristofer

26 April 2003, 08:28

<Axel>

KBGguns, a 308 Win does NOT have anywhere near the case capacity of a 30-06!

Axel

26 April 2003, 08:36

jeffeosso

quote:
Originally posted by Axel:
KBGguns, a 308 Win does NOT have anywhere near the case capacity of a 30-06!

Axel

not what the man saide...

him say "imp 50 would LOOK LIKE scaled up 308" implying that the collective INTELLIGENCES would know that JM Browning used the 30-60 to scale up to the 50 BROWNING MG

LMAO
jeffe

26 April 2003, 11:45

Grandpasez

Here is a way to improve a 50 cal.50 cal
on left--20mm/50 cal middle--20 mm on right.Ed

26 April 2003, 14:55

<KBGuns>

Thank you, Jeffe, that is exactly what I ment to say/ask.

Kristofer

26 April 2003, 16:56

Bob G

I knew a guy who competed at a 1000yd match hosted by the FCSA that was using a 50 improved chambered rifle. Took almost 70 grains more powder than a standard 50 BMG to gain less than 200 fps. Also had to be concerned with washing out the barrel prematurely.
Not really a good trade off. Just my opinion.

27 April 2003, 02:00

<Per577>

Hubel !!

I think the 20mm/50 cal. reminds me of a .378 Wby necked down to 7mm,but without belt. [Wink]

27 April 2003, 03:51

Arock

EDM Arms made a short run of 20mm/.50 actions about four years ago. Called them "Warlocks". Completed rifles looked to weigh in the 85 pound range but could have been more. Said to run an 850 gn projo at 4800 ft.sec. Got a pic somewhere; find it and I'll post it.

27 April 2003, 04:35

Grandpasez

Arock-This one here would get a 750 gr out at over 5000.They tested armour with it about 40 years ago.Get a cartridge picture of the one EDM did if
you can, as I am curious to see if they used the
double radius shoulder like one in my pic.Ed.

27 April 2003, 05:06

<'Trapper'>

quote:
Originally posted by KBGuns:
How about blowing it out with strait walls and a sharp sholder, but reduce case lenth so that the power capacity is the same or slightly smaller. Similar to a 7.62x51mm scalled up, instead of the 30-06.

.508 Whinchester?

Kristofer

Congratulations! You have just re-invented the Vickers 12.7x80SR or the .50in Vickers, a round that predates WWII! Another "Common" 50 round is the is 12.7x108mm Soviet that has also been with us since before WWII, common in the Soviet block DShK M1938 HMG. Just for comparison/illustration, the 50 BMG is 12.7x99mm in metric expression.
Now if you can just find a source of brass for all these you can have a 50 cal (or 12.7mm, if you prefer!) in three different case lengths.
WOW! [Razz]

Best regards,

27 April 2003, 06:04

Grandpasez

Trapper-Do you have a pic of the 12.7 x 108 mm long soviet round.Apicture of it next to 50 BMG
would be nice.And the base dimensions.I need to know the base diameter.

28 April 2003, 04:26

<'Trapper'>

Sorry to say I do not. I'll go over to the Cartridge collector site and see if anyone can help.
Regards,

28 April 2003, 04:49

<'Trapper'>

Go to http://www.quarry.nildram.co.uk/tankammo.html and see if that helps. Picture is not tied to the description so you will have to keep flipping back and forth.

28 April 2003, 08:50

Grandpasez

Trapper-Thanks for pictures and site info.I got a bunch more pictures for info from site also.There
is a lot of interesting stuff there.Like you say
most things have been done before.Ed.

28 April 2003, 23:14

<'Trapper'>

More info: This from one Tom Fort:
Hi there,
I measured a few specimens from my collection and averaged the base diameter at .855. Hope that helps.
Tom
Regards,

28 April 2003, 23:29

Jiri

Mr. hubel458:

What about ressurection of 7.92x107 in some single shot rifle ? (I mean you like long cases [Smile]

), or it could be chanded to .338x107 or so, maybe .458x107 could be nice [Smile]

Jiri

29 April 2003, 08:29

500grains

Hey Jiri, if you are smarter than Bush, then why aren't you president?

29 April 2003, 12:45

Grandpasez

Jeri--500 gr--Can you imagine what Rob and I
would do if we had a few barrels of those cases pictured on that site.Some have really
interesting possibilities.Ed.

29 April 2003, 22:54

Jiri

quote:
Originally posted by 500grains:
Hey Jiri, if you are smarter than Bush, then why aren't you president?

Did you see 25 years old president ? What to say ? Maybe [Smile]

, I will never be a president, but Mr. Bush will never be a member of Mensa [Big Grin]

Jiri

30 April 2003, 05:11

Dago Red

I really like the way that 7.92x107 looks, what do you think it would take to get brass for that thing? Looks like a rocket.

500gr, ignore the picture, it was fake from the beginning.

Red

30 April 2003, 12:18

Grandpasez

DagoRed--If I would have had some of that 107 mm
long brass, I might have made my wildcat 458
4.2 inches long,.With a straight design and belt
of course.Would be something for an experiment sometime.Ed.