12GA From Hell in a break action--

[Quinc]

Are there any videos on youtube of you shooting these? Would also be cool to see the damage they can cause!

[hubel458]

Two on YT- showing a 6gal sealed water pail atomizing.
1st called-- Grandpa's Cannon 2nd -- Grandpa's First Shot

In the early days; in my Greener's book he states that
gun with a rifled choke section of the barrel, called
12ga paradox shotgun/rifles, with slugs, heavier powder
charges than shot loads, could hold what amounted to
about 5 inch pattern at 100 yds.

And still had 1800 ft lbs energy at 100yds.
And that is with guns with lighter, weaker barrels
than we have today, so our work is a good extension
of what the early big bore guys did.

And then the 4bore for guys liking a big challenge, 3rd picture...Ed

[Quinc]

Pretty awesome! Need you to stop posting for a day or two and make some better videos though! Maybe even get the Professional Russian to do a segment.

[hubel458]

Thanks to rattler on 24hr forum for the old time pictures,
above, and the guys really like them. Quite interesting.

Many have success with all kinds of high-power slug designs and
with extra power, have pushed the reliable range of 12ga slugs/bullets
from 75 yds to over a 150 yds. ...Here is picture from a 1926
Manton catalog showing, 1st picture, many brass case old time slug loads.
Notice the 20bore and 12 bore ones with pointed slugs, seems
as ideas to hotrod 20s and 12s are old hat, not as strong as 12ga FH ....
Both Pictures below from lancaster and CptCurl on Nitroexpress.

2nd picture are saboted slugs, called the SAGA, from Spain,
next to a Brenekke on the right..AS far as I can find only
sold so far as loaded rounds. They look great to reload with
if ever available..

3rd picture is from my Greener book, of double 8ga elephant guns.Ed

[hubel458]

You can see various operating 4bores, etc on you-tube..Ed

[hubel458]

Here is picture of an early falling block for big bores
called the Field I think. Looks like some other
side levers, looks like lever works forward.

And speaking of falling blocks next picture is the
start or 'fixins' so to speak for the next step
up, for my 2bore. Same design as the 4 and 8
bores only wider.

I am now getting 2.25" OD barrel reamed
out to the two bore size.
And a square hole for breach block done
in that hunk of 4130 steel.

Other experimenting, a while back, when I made
my 585 Short HE from Gibbs cases, I also made a
620 Short HE from Nyati case, of the same design,
IE, head spacing on the mouth and extractor.
Using 600NE .620" diameter bullet and 2.7" long case.
Case could be shorter or longer like the 585 one.
Didn't do much with it as its sides were very straight
only .010" taper of both sides together. Whereas the
585 Short HE had .027" total taper both sides. And any
Nyati brass I got, went to make my 585HE cases..Ed

[hubel458]

First is picture sectioned Explora case and slug, showing how
they kept weight down so that it could be stepped up in
speed in older doubles, with just short rifling section at muzzle,
that didn't have real heavy barrels. Second picture from Greener
book here, is of older 4 and 8 gauges.

Third picture shows steps of making 4bore case, one inch bore,
from 20mm. 2nd in picture is case with base turned and swaged
to size which leaves base smaller than rim, for rimmed case.
Then 3rd case has top expanded to take 1" diameter slug.
last shows the thickness and strength of finished case.

Testing factory 20ga Hastings sabot slug 3.5" hotrod loads, and
reloaded with 20ga SPW identical slugs, 390gr, goes about 2200
from 30" heavy barrel. Load was 75gr of 4759.
Factory is about 1900. For regular modern barrels you could
do with 65 gr and get about 2000.Ed

[hubel458]

Some info about our slower powder reloads in plastic and
brass cases with shotgun primers for modern 12ga guns.
I now prefer the IMR 4759 over 4227 as we have had
some delayed firing problems when the loaded cases get
real cold with 4227..And with slower powder loads use
magnum primers.

A side note,in same vein, you know I now use FED239
mag primers in my 8ga and 4ga, but we find they they really
solve the real cold gun, ignition problems, in muzzle loaders
using black powder substitutes, with shotgun primer
inline guns. We tested 50cal and a primer sold especially
for ML when fired,no powder, only saw a tip of the flame
out the barrel, a FED209 mag about 4" flame, buta Fed 239
Mag primer about a foot of flame.

Some more info from the old days, here is picture of
a variety of slugs being promoted and used a century ago.
And 2nd picture Paradox cases old and new.Bottom one is a
modern version sold by H&H for slug hunters.Ed

[hubel458]

We are always looking for way to shoot 8 and 10s
using easy to get components,cheap, without buying
loaded rounds for big bucks, if available at all.

In 8ga falling block, plastic got 930gr hollowbase
slug to 2300, It is a slug for 10 ga that we expanded
base a little to fit tight in 8ga wadcup. On the left in
picture. At 30 yds 3" group. Just with open sight,
About like the 10ga sight bead. There is enough hollow in
the base it flies pretty good from 8ga smooth barrel.

Along same line, in my 10ga 32" smooth bull barrel with a
750 gr .69cal hollowbase Dixie MZ slug in VP100
10ga wadcup about same speed and same accuracy.
Nice to just get a box of slugs that is in stock,
and a 2cent cent wadcup and Fed 3.5" 10ga plastic cases
and be shooting cheap.And the cases roll crimp nice
down to these slugs.

And also the hotrod 20 ga 3.5" Hastings factory loads in
a smooth barrel moderate weight 20ga shoots about
same accuracy even though they say for rifled, but that
SPW slug/wad combo has enough plastic and seal on the back
and to shoot like aBrenekke. The new 28ga Brenekkes
out of 28ga NEF modified choke barrel shoots same at 30yds.
Scoped guns and good eyes would shrink groups.Ed

[hcbr]

wow glad this thread just keeps kicking, interesting reads! keep them coming~!

[hubel458]

A different, interesting style, of 12ga slug, from Russia.
First picture loaded round, in plastic, roll crimped.
Second, two types of slugs they have on the same base.
Base for rifled barrel, little smaller diameter than the front.
Looks like the roll crimp locks against
the edge of the base. Neat idea, and it could have a
flat meplat slug on the front of the base like
the US-S brass slugs fron Greece are on the
plastic bases that I have here. They must use a crimping
die with a deep hollow up in the middle. We have thought
of taking a roll crimper and putting a deeper recess
in middle to load longer nose slugs further out so as to
have more room for our slower powders.ED

[hubel458]

Here is picture of 4 long cases of
RIP's on the AR forum.
Top being a Rocky Mtn Cartridge
3.5" turned brass 20ga. In 20ga
getting these and lengthening chambers
allows use of the 3.5" 20ga plastic also.
Some factory guns are 3.5"

Next a RMC 3.5" turned brass 12ga.
Chambered for these you can use
3.5" 12ga plastic also.Some guns are
3.5" from the factory.

3rd down our 3.85" 12ga FH we made from BMG brass.
Bottom a RMC 3.85" turned brass 12ga FH case.




Next picture shows one of the old ways they locked slugs
into paper cases. Many old slugs had a wide deep groove
which made it possible to crimp that way.You can
see one of those slugs in the picture.




Testing 490gr 12ga full bore Lee style slugs in 3.5"
plastic at 2200. Works in the long barrel rifled NEF and
the Khan 12ga 3.5" auto smooth bore.

In same guns the 570gr US-S brass slug with
locked on base at 1900 in 3.5" plastic worked also.
It is great to see a smoothbore slug like the US-S
that is as accurate as fullbore slugs from
rifled barrels.Maybe they will be imported soon
from European Cartridge.Ed

[hubel458]

Here are couple more pictures of longer bullets
in sabots, loaded in plastic cases, with the
roll crimp down against the sabot. Both are
ideas tested by European Cartridge in Greece,
who make the US-S slugs. Both longer bullets
pictured have the locked on base that their
other US-S slugs have, for smooth bore accuracy.
2nd picture shows a deep hollow roll crimper
for doing slugs like these.Ed

[Bigyates]

[QUOTE=hubel458;7577588]First is picture sectioned Explora case and slug, showing how
they kept weight down so that it could be stepped up in
speed in older doubles, with just short rifling section at muzzle,
that didn't have real heavy barrels. Second picture from Greener
book here, is of older 4 and 8 gauges.



[IMG]http://www.gunownerstv.com/explora.jpg[/IMG
Ed,
The Leslie Taylor designed projectile was not necessary to increase the velocity within pressure limitations in the Westley Explora and Super Magnum Explora cartridges and guns. That was accomplished with special duplex loadings of cordite and fine blackpowder. The purpose of the hollow elongated bullet was to increase the effective range of the ball and shotgun beyond the 150yd mark. Westley also loaded a similar weighted (730gr) solid "paradox" style bullet in the Super Magnum Explora at the same 1500fps velocity with rifled choke shotgun barrels.

[hubel458]

Granted that the streamlining helped for range
But that hollow nose also kept the weight down so that they could
get 1500 fps with 750gr, in the barrels/actions they had, when regular slug
loads at 437 gr were only doing 1200 in most guns. Without hollow nose
under the cap the slugs would be 1200 gr and it would take
a heavy barrel and strength like we put in Sav 210 to do those
at 1500. The Savage has almost 50BMG strength.

This picture of an RC4 brand slug I see is available
down under. It has locked base like Brenekke.
And locked on without discarding petals, like US-S.

And 2nd picture is a group fired with RC4 slugs
by fellow on NitroExpress forums from
double 12ga, 2 left and 2 rights at 25yds.
This shows the posibilities of smoothbores,
rather than not trying to perfect them.

3rd picture is a discarding sabot base, and with
four discarding sabot carriers, with centered
penetrating solid bullet, from France.Ed