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Now these loads are for only heavy barreled
steel action guns like the NEF Ultra 12,
or like my Savage with heavy barrel added.
I am getting heavy barrel on the 87 and
it will be long.There are some turn bolt
locking lug pumpguns that would work
with heavy barrels.There is a large
12ga Tula bolt action, but it's not imported.
This week if weather allows(no rain)
I will be firing first test loads of my
700HE long belted case.Ed.
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I want to see this scaled up to take
700HE, 12ga FH, 700NE, 50bmg, Rob's 700, etc,
or even 4bore, 8bore,20mm, 900HE.Anyone else
interested jump in. Were going to give it
a try. Ed.
http://www.gunownerstv.com/wic.jpg
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hell i think this is real fasinating. I still remember when they said that the 44 mag was not needed and was to powerful to shoot. Now were shooting .475s and .500s and there not even top of the food chain in power. Alot of guys are in shotgun only hunting areas and im sure some of this technology will translate into better slug loads for the avearge guy. I think a high velocity flat shooting 20 guage heavy load with a hardcast would be neat too!
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Found an O/U that would handle the 4759 3"
loads. It is the Zoli Z-Sport. Expensive,
all alloy steel construction, tested to
about 100k. That's not a missprint.Their
site shows testing at the Italian proof house
of 8000 bar.That's 7-8 times regular shotgun
working loads.Pic of action below. It handling that extreme pressure, means that other quality
O/U like Ruger may handle 4759 loads.Ed
http://www.zoli.it/america/images_z/z_espedition2.jpg
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I get questions about whether the IMR 4759
loads aren't to high pressure.Even for NEF.
Well in Nef the REM factory Buckhammer
slug load, expands the base of the case
more than my 90gr, 4759 load. And I get
more speed, in the same kind of
Rem case.And pressure testing will tell us
for sure what we have wrought..Ed.
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am working on
scaling up falling block to handle
700NE, 600Ne. 12ga FH, etc.We wanted to go to bigger 4bore size copy of Wickcliffe
but the short hammer carried on the breech
is too light to fire big primers.and hammer spring can't be made heavier either.So I am
drawing one scaled up to 12ga and 700NE size.
If used with our 12ga FH case will have to have
primer bushing........
SO- today the boy and I set up a mill.
And we along with old machinist guy couple miles away will build a model scaled up with
basic action and breech block designed to work with lever,toggle link. 1.25" barrel thread.
And for the 4bore size falling block, the
HSFB, 1.5 barrel thread, 2' wide action we
will combine a little from Stevens 44 1/2,
Ruger #1, Win 85, Sharps highpower falling
block. The Wickcliff copies a lot in its breech
from the Stevens.We will use a big hammer in the
rear of action with heavy springs,
to fire big primers. Half cock safety.Those
we appropriated from other break actions and
along with trigger and a lever are on
the way from
Gun Parts.Ed.
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Hot Damn- Test Results of 4 plastic cases.
Rem high base 3" case, with 600 gr
Dixie hardened slug. Roll crimped with
crimper in drill press. All 4 loaded with
90 gr of 4759. We have a winner.
Average velocity of 4 -- 1938 fps
Average pressure of 4 -- 14, 575 psi.
tested with transducer test ing setup,
in 30 inch barrel,In my 24" NEF I got 1800+.
Cases fell out of his test chamber like they did out of
my NEF.And with some cases I can get in 95gr,
that I figured with my math would
have 15k psi.So my math and developement is
OK.And 4800 ft lbs, thats neat with plastic.
Tom says this load will do in any gun that handles
the 2 oz factory magnum goose loads
that test about 13,600 to 14,000.And 4759
will give slower time to peak pressure, thus
will be easier on cases than magnum goose loads
or the hot factory Buckhamer slug loads
I fired, that expanded cases as much or more
than our 4759 loads.Ed
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Buckhammer 3 "factory loads are 15k psi.
A 2.75 inch case with 80 gr of 4759, a thin card wad,
a 3/8 cushion lubed felt wad, when crimped is about
2.4 inches long, with 600gr Dixie slug. Based on
pressures recorded in previous post for 3 inch case
and 90gr of 4759, they will run about 13,400 psi,
and work through modern guns.Another load tested with
same bullet, 65gr of 4759, tested at same place
was 11,800 psi and 1640 fps. So you don't have
to put in my max loads, but go down a
little and use in modern guns that
are lighter than NEF so they don't kick so bad.But yet
you can get fairly good energy levels for big game, 3300
to 4000 ft lbs of energy.Ed
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Here is picture of case fired 25 times,
in my 700HE test barrel, to show you
how cases stretch and thinout from
repeated firings of high pressure loads.
You can see where it is thinning just
above the belt. Half of the loads were
high pressure loads. Regular 10,000 ft
lb loads wouldn't stretch cases at all.
This is made from bmg brass like our
12GA FH. 700 is belted and 12ga has rim.Ed
http://www.gunownerstv.com/25.jpg
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Some research. Anyone with a Mauser converted
to 12ga shotgun can fire our 4759 loads.
One was the GEHA, other REMO. The locking lug for bolt is the rear safety lug and if you wanted an extra lug do an Ed on the bolt
handle base to make contact between bolt handle and bolt handle recess.They are not long enough
for our full length case, but came with 2 3/4"
chamber and magazine.Were 2 shot large ring
converted military mausers.Studying this gun lead me to the idea that a fancy 12ga with 3" chamber could be made by the same thing that Germans did to the Mauser to make GEHA. Just use
a S&L, Colt Sauer, etc, with rear locking lugs.
Grind out inside diameter of action from rear reciever forward so 12ga case will feed, Rear of bolt will still center ok as lugs and metal
are there. The silver solder combination guide extension to support 12ga case on the left side
of bolt, and put extractor on right side.
Like a Sako or whatever.Face off the recess on front off bolt flat, Put in 12ga barrel with chamfers to clear extractor.A 788 Rem
may work, at least with a 2.75" case.
For repeater action, Open mag
well to hold a single stack of 1 or 2
12ga cases.Fancy gunwrighters badmouthed
the GEHA, but geese hunters just loved them,
as they handled heavy loads fine. Ed.
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I have also found that the rear locking lug
idea will work with an Enfield, and it would
long enough for our long case with little
work. Work long case as singleshot.
Work as single stack repeater with 3" 12ga.
The bolt handle base would be one lug, and is quite large, which would be stronger than
goose guns built same way.The
left locking lug woud get a bite out on
its end if front was bored out to .900,
tp allow feeding of 12ga case.
But I found a way to add extra lug in the back by opening sight recess that is in rear bridge
down through to bolt raceway, mill groove on left for lug to turn into that
opening and mill square recess into bolt and add lug on left.Result 2.5 lugs, with enough
strength to hold 30k plus loads easily.
Ream out front of action. Barrel threads are
as big as Savage, little more than Mauser.
Face off front of bolt flat.Add pin in ejector
cutout to support case opposite extractor.
The original lugs will guide for feeding.
Screw in heavy 12ga rifled barrel.By the way
would work for 700NE,My 700HE by keeping
pressures moderate. Could handle 600Ne,
full pressure. Ed
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Okay here's another "what-if".
Based on their experimentation of adding a rimmed head to a modified .50 case it seems to me that it would be quite easy to create a wildcat 12 gauge rimless cartridge based on a necked-up/blown-out .50 BMG case. Call it the 12 gauge Browning Rimless or the 19mm Browning Shotgun.
It also seems to me that it would be possible to then install a 12 gauge Browning Rimless barrel on a .50 BMG rifle and in essence have a convertable rifle/shotgun unit since the bolt head would be the same.
Since the barrel is removed from the Barrett for normal takedown it seems to me that a second shotgun barrel would be easy to install.
If you could get the Barrett to function in semi-auto mode it seems to me that a 20" barreled, 12 gauge, M82 Barret would be the ultimate "Rocdblocker" type shotgun.
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When Rob made his 700 BMG Imp, he didn't have
very much shoulder to headspace on.If you went from
700 up to .729(12ga), a shoulder to headspace
on would be gone. If you managed a case with small
shoulder it wouldn't be straight to use with shot
like our 12GA FH case can.My regular belted
full length 700 HE will work with same boltface as a
50 BMG. Another reason we made 12GA FH with 12ga base
size, rim included, is to be able to call it a legal
12ga, as chamber would fire shorter 12ga cases.
Like a 3.5 inch 12ga will fire 2.75" and 3" inch.
Our will fire shorter also.Ed
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Of course the 19mm Browning would have to headspace on the mouth like all other straight-sided, rimless cartridges do.
For bolt action guns it could me marketed that with a simple bolt change, standard 12 gauge ammunition could be fired.
For Topper style guns (ouch!) an extractor could be designed that would work with both rimmed and rimless cases.
Probably would work with falling block actions as well.
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Problem with headspacing on mouth is heavier loads cases
stretch and trimming is a pain. I made my 12GA FH
and my 700HE and other long wildcats with chambers
.050 long so that wouldn't be problem.Bolts are easiest
to go back and forth.We have one fellow who is
putting 12GA Fh in AR50 upper, so he can change bolt
and barrel and go back to 50BMG.Ed
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Straigh walled cases don't suffer from as much stretching problems as bottlenecked ones do.
Usually a straight walled case will stretch to the maximum length of the chamber and then go no further.
Unless the chamber is loose enough to allow it to overly expand and then get excessively worked in the sizing die.
I've reloaded .45 Winchester Magnum cases 20-25 times and not had to trim them.
And the .45WM, at 50,000 PSI, is a porportionately higher pressure cartridge than the 19mm Browning loadings I'm envisioning.
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Here is picture of top part of the
first scale-up model, next to smaller
Wickliffe. It has 12GA FH round in feed
trough. It is aluminum just for a model.
It will handle 12GA FH, 700HE, 700NE, 600NE,
etc. Bottom of block is flat to set on
mill table to do the machining.Next machining
will be the hole and slot down through the
action for breech block and hammer to
slide up and down in.Its taken awhile to
get some tooling.I had none when we set up
vertical mill, and have to get more.The
action model also will be narrowed up when
finished, and contoured to look as good
as the Wickcliffe.Ed.
http://www.gunownerstv.com/su.jpg
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Tested the Wickcliffe with 12ga FH case
in a temperary chamber to see if
hammer with beefed up spring would fire
bmg primers.I scalloped out the back
of the action so 12ga cases would feed
into the action and temp chamber
They fired ok. Bur the extra stiff spring
makes it hard to cock. We will have to work
on that.The original Wickcliffe
action that we want to scale up is tall
enough so that when breech block is
lowered the block clears the bottom
a 12ga rim when cases slide out of chamber.
So in the scale up we need to just add a
a little width for wider breech block,
and the bigger barrel thread, and keep the
sides thick for strength.Ed
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In response to guys who can't find 4759
we will test powders in the same speed range.
Tested 2 fast stick powders, 4198 and 4227.
Both didn't ignite good with small primers
in plastic cases. Another I plan on trying
VV110, when I find some. It is bulkier
and slight chance may work like 4759. Ed
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WOW!
Hey Ed:
IF you'd spend as much time with your machining and experimenting
as you do typing on the 'puter, you'd get things done a whole lot
quicker. hehe!!
What's the weight of a .715" round ball?
How do/would they work in 12ga hulls for hogs??
Great post, enjoyed reading the whole thing in one sitting.