12GA Rifle From Hell

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.
 
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
 
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
 
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

25.jpg
 
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.
 
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
 
Other bolt guns with rear lugs that would be
neat Mauser 12ga GEHA like conversions, would be
Champlin and Golden Eagle 7000. That Champlin
would make a real beautiful 12ga.
Hell to give the French equal time............
now watch out........... you could use
a rear locking MAS.Its bolt is .800", a
tenth of an inch bigger than most, including
mauser, bolt actions. Best damn use for that
gun that man could conjure up.With
its larger bolt a real easy conversion,
and with two rear lugs, it'll handle
Magnum loads fine.Ed
 
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. Anyone with some surplus long
end mills and R8 tooling, holders,big drills
let me know. I need a bargain on some.Ed.

su.jpg
 
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
 
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
 
The actions will be highwall for strength.
Fired couple 3.5" cases with 90gr
4759 and 460 grains of buckshot,
14 number 1 buckshot.Fired in nef,
pattern huge due to rifling, even with
shotcup. They were going 2000 fps plus,
and went through 1/8 steel on end of
stand. Ignition perfect, extracted easy.
In smoothbore be a real hairy load.
With three 3.5" plastic cases with
100gr 4759, 600gr slug. Used .135 card wad,
a 1/2" and 1/4" felt wads. 1900+ fps
in 24" NEF barrel, same low pressure as
the 3" cases we pressure tested. I have NEF
chamber lengthened for our longer
brass case. A nice long barrel we'd
have 2050 plus.Ed
 
Here is pictures of the breech, lever,
linkage, etc, set up on a block to
get the geometry for the scaleup model working
ok.And setup measurements to make the breech
hole in the action, in right place.Also used
this model to get hammer and trigger set
up to ride on the breech block. With
a strong hammer and trigger in the right
place in the guard.In the pics above you see the pin the
lever pivots on. The actions being bigger
will be wider than the levers;So the space on the
pivot will be taken up by the Ruger
style extractor on the left side and a spacer
on the right side. Spacer also acts as a
breech block stop at the bottom of the
breech travel.So to get block stopped at
right position for the diameter of the case
and feed trough, we adjust spacer size.
Ruger extractors from GP changed
a little bit will do.Ed.

70.jpg


71.jpg
 
Found info an a double that would work
for making 12GA FH. It's a Spanish 10 ga
on an 8 ga frame that we think Stoeger and
maybe others imported years ago. It says
No. 6 HG on trigger guard. It is over 2 & 3/4"
across outside of both barrels, chopperlump
barrel pivots, with heavy locking lugs,
and A purdey style third fastener.Top lever.
Barrels are big enough to use as monoblocks
to screw in heavy 12ga barrels, with same size
threads as my Savage and it being a huge action
could handle same loads as the Savage.Like
12-17,000 ft lbs. Ed.
 
Here is sectioned action with parts in.
Original action that had defects
that I sectioned down the middle..I
ground out the top to allow case
to set higher, representing a
the taller action that we will
have due to larger diameter cases.
That lever in the picture is the
lever we will use with longer stroke.
Also in the action layout is the
breechblock, hammer, trigger with a
12GA FH in front, all in to check layout.
This lever looks to be easier to fit
and shape to bigger action and stock,
with a good pistolgrip to handle recoil.
Lever shape fits where trigger is better.Ed

hta.jpg
 
Double pumper 870 big bore. 20 shots.
Be neat with rifled barrels and our
600gr 4759 slugs loads.Fires both or
on at a time. In classifieds on THR. Ed

1009397zr5.th.jpg
 
I will be posting more research on this thread
about other powders in 12ga plastic cases,about the
12GA FH loads, about scaled up falling blocks, my 700HE long
belted case, and the 28GA FH.Here is picture of
some other cartridges I have with some of mine.
1st= 408CT, 2nd- T-rex necked to 416- 3rd- 600OK
4th- 510HE, 5th-585HE, 6th-700H 3.25, 7th-12GA FH,
8th-700HE. Last most powerful. Ed

chh.jpg
 
For you big bore collectors.Maybe
get some for collections as the guys
who ordered them, didn't take them.
There is a whole bunch of the Tula 4bore
cases at Rocky Mtn Cartridge Co.
This was the run we had made for the
Tula 4bore pumpgun. It's a 3inch 4bore
case. 20 bucks single case, shipping and all.
The price of brass and machining is twice that.
Here is pic of the gun it went into.Ed


bigbore.jpg
 
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