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hubel458
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Posted: May 28 2007 at 9:58pm | IP Logged Quote hubel458

Tested a 750 gr banded solid, grooves .009 smaller
than land diameter and got same velocity as
with lead slug weighing the same at same pressure.
Other banded brass slugs with groove debth
same as land raised pressures compared to lead.
Got 2700 easy with 750gr, in long case in Savage.Ed
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hubel458
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Posted: June 08 2007 at 9:21am | IP Logged Quote hubel458

The folks at 50 Cal suggested we write up a
piece on the 12GA FH. Interested in what we
did to make hairy cartridge using 50 cal brass
adapted to the 12 gauge shotgun platform.
A job for Rob to do? His wild idea has been
viewed about 400,000 times in the forums
we put it in.Ed
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hubel458
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Posted: June 16 2007 at 8:23pm | IP Logged Quote hubel458

Anyone got any long 12ga rifled 30" plus
barrels, 1.3" plus diameter. Barrel
guy is shutting down and returning funds.
Been waiting for 12ga heavy barrel for
87 levergun since last summer.Boy it is
hard getting projects done.Ed
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hubel458
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Posted: June 23 2007 at 7:52pm | IP Logged Quote hubel458

Here is a simple outline of what we've done with
our project we call the 12GA From Hell.
Some folks have asked us to do this.

A. The idea for this and the name was by
Robgunbuilder on the AR forum. We figured out how
to make a long brass case, from BMG brass by
machining rims and the case to screw them on.
We ended up with case after mouth was
annealed, fireformed, and expanded to 12ga,
that was 3.85" long, with a big BMG primer.

B. Rob put his in a big Borchardt falling block,
a gun that can take full BMG type pressures.
It had firing mechanision that fired primers ok.
Example top load is a 1000gr turned brass slug at
3100 plus fps, and a 7/8oz 12ga sabot at
4300 fps.

C. First of mine in a Savage 210 bolt shotgun with a
heavy rifled 31" barrel. My loads in this were kept
below 35,000 psi. Giving loads of 2700 fps with
a 730 gr hard lead slug, and 3900 with 3/4oz sabot.
Second gun was a NEF Ultra that I lengthened chamber
to take long case. Top loads are 600gr hard slug
at 2500 plus fps.Both Savage and NEF had to have
firing mechanisions beefed up to fire BMG primers.

D. We cut cases back to use in 3" chambers but
all guns have to have beefed up hammers, etc,
to fire the big BMG primers.The BMG primers
fired the slow rifle powders ROB and I
were using very well, no misfires.
So tried 3" RMC brass cases, regular plastic cases,
our cut back cases with primer bushings, all with
smaller regular rifle or shotgun primers,
that regular hammers or firing pins fire ok,
and found out that our slow rifle powder loads
wouldn't fire reliably with small primers.
The slow powders in large diameter cases
needed BMG primers to work. So to use small primers-

E. We went to much more research. We found that
slow powders could be fired with a 10 gr of a
fast shotgun starter powder, under the slow powder,
using small primers. This concept has beeen
used in NE cases. We also searched for rifle
or pistol powders slower than shotgun powders,
that would fire with small primers and no starter,
that didn't up peak pressure to fast as
we increased loads to increase velocity.
We didn't want to over expand RMC brass or
blow out the rims on regular plastic cases
We found three- IMR 4759, VV-N110, and 7383 surplus.
These powders are easier to load for slugs without
the problems of fast shotgun powders pushing up
the peak pressures to quick, as you try to increase
loads to up the velocity. We use a minimum
thickness overpowder wad or other wads in the loads
under the slugs as needed. We had lab test 4759
loads with 600gr slug and pressures were little less
than the magnum REM Buckhammer factory loads, but
we got 400 fps more velocity. The Buckhammer
slug and locked on wad is about 600 gr.Both our tested
loads and Rem loads are 3" plastic.Our loads are for heavy
barreled guns only. IE; all slow powder loads whether
with starter powder or 4759,N110, 7383, use heavy barrels,
as the pressure curve is higher down the barrel
and might split regular skinny shotgun barrels.

F. We plan on heavy barrels for testing 1887 Win
leverguns, for Mossberg 695 bolt guns, for
various heavy double shotguns, for various
O/U, for modern alloy guns, etc.We are helping to
design a big falling block for 12ga diameter
that can take high full load pressures,
that is reasonably priced.. We plan on testing
other powders, for use with small primers. We
plan on setting up pressure testing barrel for
the long 3.85" case, to test the whole range
of slow powders and bullet weights, in the future.
The testing lab now can only do 3" 12ga cases.
We have found heatreated Dixie slugs that can
take super velocities, we found brass slugs with
relieved grooves that run same pressures as lead,
or copper jacketed, at same velocities.
We found 7383 powder pushes 870gr safely, full loads,
in 3 inch plastic, RMC 3" brass, etc cases.
This research and work is super great fun,
we are glad to share.We will get pictures soon of
the muzzle blast with long case, and pics
of penetration tests. Ed
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hubel458
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Posted: June 29 2007 at 1:18pm | IP Logged Quote hubel458

Found another powder that works with small
primers in plastic and RMC cases. 600gr slug.
It is IMR 4227. Ignition perfect, same load
levels and velocities as 4759. My earlier
report of 4227 not working was in error
due to what looks like 4198 in a jug
hand labeled 4227 I got in big batch years ago.
Greg told me 4227 worked for him so I got new
jug, and saw the difference from jug I had.

So slower than shotgun,the powders that ignite
properly; we have 4759, VV-110, 4227, 7383 surplus,
the latter a slow powder that also works
with real heavy slugs Ed
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hubel458
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Posted: July 07 2007 at 8:38pm | IP Logged Quote hubel458

Pressure tested 7383 with heavy powder load.
870 gr with 128 gr of 7383-- All that could
be put in REM plastic and keep length to what
would feed from magazine of a 3" gun,
after it was roll crimped with tool in drillpress.
1513 fps-- 14700 psi. That is a slug 50%
heavier than factory Buckhammer at little
faster speed and at little less pressure.
Ignition perfect, cases fall out.
Love that $3 a lb powder.Ed
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hubel458
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Posted: July 14 2007 at 1:13pm | IP Logged Quote hubel458

Finally able to make the
longer barrel improvement on
the 1887 12ga levergun.......
Rifled and heavy and 31"
long. After many months finally got
a barrel.Ed

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hubel458
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Posted: July 22 2007 at 12:59pm | IP Logged Quote hubel458

With NEF. Plastic cases, roll crimped slug
in drillpress. 82gr IMR 4227 1650 fps,
with 730gr, 78 gr 4227 with 800gr, 1600.
Expansion on cases show little more pressure
as full loads of 4759 and 600gr.
Ignition perfect with small primers.
Ejects cases fine. Burns clean.
Got a GEHA bolt 12ga to put a heavier
rifled barrel on to test. Ed
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hubel458
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Posted: July 29 2007 at 7:23pm | IP Logged Quote hubel458

Tested 870 gr in NEF with our long
brass case with big primer.I have NEF
with extra hammer spring for big primer.
Got 2000 fps and still able to extract case.
Would do little more, extractor needs
to be wider and set up positive.
Used 260gr of WC-860 and MagPro.
Could use RL-22, Rl-25, Retumbo, etc.
That's 7700 ft lbs.. I get 600 gr slug to
2300 plus in NEF, long case. so you can go
light or heavy.Ed
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hubel458
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Posted: August 04 2007 at 10:10pm | IP Logged Quote hubel458

More testing with 4227. Greg got little over 1500 fps in
3" plastic with 870 gr slug using 74-75 gr of 4227.
I did the same. This compares to much lighter
REM Buckhammer slug with more speed. Almost all
the way through 5 ft bundle hardwood boards.
I have Mossy 695 as well as GEHA 12 gauge
to put heavy rifled barrels on. And my 87.
Will be checking Mossy 395
for a guy who wants to put on
a heavy barrel. Ed
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hubel458
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Posted: August 16 2007 at 9:55am | IP Logged Quote hubel458

Here is pic of 695 bolt action
Mossberg with dinky barrel and the heavy long
rifled barrel for it. It has a recoil plate
like Rem/Sav, and two rear bolt lugs..Ed


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hubel458
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Posted: August 22 2007 at 12:40am | IP Logged Quote hubel458

Read a report that H & H is going to
make Paradox rifle/shotguns again.Big bore
mania is catching on.Be able to use
shot and slugs, and with newer alloy
barrels, they'd be hairy like the guns Rob and
I have set up. Ed
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hubel458
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Posted: August 30 2007 at 9:46pm | IP Logged Quote hubel458

tested in NEF 3" cases, Alliant 2400 with
small primers, Fired ok at 75 deg but when
case cooled there was majority of misfires
and squib loads. Don't reccomend it.
Here is picture of Mauser 12ga bolt action
GEHA with a heavy barrel like one I will put
on it. Make a good slug gun.Ed


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hubel458
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Posted: September 07 2007 at 7:24pm | IP Logged Quote hubel458

The 12GA From Hell is now on
Ammoguide, the last page of
cartridge list.Ed

http://ammoguide.com/?catid=611
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hubel458
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Posted: September 17 2007 at 4:26pm | IP Logged Quote hubel458

Saw info on a break action that
would handle 12ga FH.It is Cole,
with a strong top lock and real wide
strong extractor.Ed
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hubel458
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Posted: September 26 2007 at 8:12pm | IP Logged Quote hubel458

Tested 3.5" plastic cases in NEF, small
primers. My chamber is long for our
long brass case, so they work fine.....
600 gr slug, 105 gr of IMR 4227,
got 2100. Same slug, 180 gr, 7383 surplus,
got 2100 fps. That's 5800 ft lbs from
plastic shotgun cases.Ed
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hubel458
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Posted: October 06 2007 at 8:11pm | IP Logged Quote hubel458

Along with testing loads in 3.5" plastic, later tested same loads
in 3" RMC brass cases; and with 600gr slug, same wt 4227 and
7383 surplus powders got same 2100 fps.I got a MEC Super Sizer
coming to size base of plastic and RMC cases. Both are hard to
resize with regular die, but this will save time and allow many
more firings of the cases.Just got 3.5" plastic for dime each,
and this sizer will allow as many firings as the RMC brass.Ed
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JimP.
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Posted: October 10 2007 at 6:23am | IP Logged Quote JimP.

Where do you purchase your projectiles you use for your tests, I am interested in the Dixie 600 gr slugs...JimP.
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hubel458
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Posted: October 10 2007 at 9:31am | IP Logged Quote hubel458

Jim- I got them from, Dixie Slugs
in Florida. 352-542-2100. Ed
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gstanfield
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Posted: October 10 2007 at 3:31pm | IP Logged Quote gstanfield

The NEF you keep refering to, what exactly is that action? I may have missed the post where it was talked about, so sorry if you've already listed it.

thanks,
George

__________________
‎"A gun is a tool, Marian; no better or no worse than any other tool: an axe, a shovel or anything. A gun is as good or as bad as the man using it. Remember that."

~Shane
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