12GA FH to 700HE to 4bore- Magnum Results-

[rraju2805]

Interesting & awesome.
Thanx a lot for sharing.

[hubel585]

More history of firsts, in our 12ga FH and big bore work.

First picture is Rob's 50BMG size falling block, that was the
first gun that the 12ga FH case was chambered in.
It is a modern Borchardt and can take full rifle pressures.
With this gun Rob was able to get 1000gr 12ga solid
slug to 3000 fps. The 2nd gun to have this case was
my Savage 210 pictured earlier.

Second picture is the first NEF 12ga Ultra that we put
the first 12ga fH case in. I only had to lengthen chamber.
The same gun now has long barrel and thumbhole stock.

Third picture is first NEF 10ga heavy barrel that we put
the 10ga FH in. Gun came with long 30" heavy barrel.

Fourth picture is the first 8ga test gun we built using the
super strong 8ga kiln cases with the belt step swaged
down. It is an Enfield that we reamed out to take the
case, like the 12ga Mauser 12ga conversions were done.
And we added extra rear bolt lugs for strength.

Fifth picture is the 1st gun my 700H 3.25 was put in.
It is and Enfield and gets 1000gr bullet 2100 fps.
Sixth picture is the first my 585HE was put into.

[hubel585]

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

[hubel585]

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

[hubel585]

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/seal on the back
and that it shoots like a Brenekke. The new 28ga Brenekkes
out of 28ga NEF modified choke barrel shoots same at 30yds.
Scoped guns and good eyes would shrink groups.Ed

[hubel585]

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

[z375]

Ed,

Seems like the boys at WR came out with the first bore-rider prototype when they introduced the "Super Magnum Explora" projectiles

[Sakobav]

Ed great post will read it
best

[hubel585]

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

[hubel585]

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

[hubel585]

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

[hubel585]

Some more slug and sabot ideas folks are doing.

First is a long pointed slug with locked on base,
It goes to target with base,can work smoothbore.



Second is picture of Hexolit sabot base slug
with petals expanded, sure would make bad wound.



Third shows a variety of Gualandi slugs you can
get for reloading, and we're finding that these
locked base slugs, Brenekke/USS style slugs, are
giving good accuracy in smooth barrels which can
save when doing heavy barrels.Weights shown in
grams, get our weights in grains multiply by 15.4..Ed

[hubel585]

Here are some more sabot/slug and loading concepts.

First is Alcan 2.75" paper case with Dixie 600gr slug,
with the side of the case crimped into the relief/lube
groove of the Dixie slug.The groove in the Dixie isn't
quite as deep as the groove in the Fosbury slug shown
in earlier post, but still seems to crimp fairly tight.



Next are various slugs in 12ga REM sabots that take
57 cal slugs and bullets.Those sabots are from the REM
Accutip loadings. In picture you can see one of the
REM 385gr jkt bullets they use. Also is sabot
with 20ga cast Lyman. On right sabot with hardcast 585 cal
640gr lead bullet, the ones I use in my 585HE wildcat
case. I sized it down a little, perfect fit.
Also the .575 cal Dixie Gunworks lead slugs will do.

Also shown is a long pointed 55 Boys bullet in one,
fairly tight fit.We cut back .3" of bullet off so it
fit for length in sabot and is 750gr.



Third are 3.5" brass and plastic with the REM sabot and
the 750gr pointed slugs in them.In all the sabot work we
and others have done, trying to get accuracy and high
speeds together, maybe there is such a thing as too
much plastic. IE, sabots too thick on the sides if doing
50cal or smaller in 12ga sabots, for heavier slugs
at high speeds. Thinner sides may discard more evenly at
the greater pressures and violence of high speeds.
Thin sides may have less give so that sabot grips slug
better to impart spin in rifled use. Example in
smoothbore use is the USS slugs, where the brass slug
is .629" with thin discarding petals that have proven to
be very accurate. And with both reasonable priced sabot
offerings the last few years being undersize, accuracy
problems, etc, maybe time to try something else.

Got to find whole bunch of these sabots. Are these pictured
12ga REMs the only 58cal ones around? I can't find others,
and maybe we can find where these are made. As I have
huge numbers of the 585 slugs, which by the way I think
is best hunting combination, without extremely heavy slugs
which suffer for the speeds needed for longer range use.
It is hard lead, good for big game.And my guy can make many,
many more if needed whether for 585HE rifles
or in sabots if we can find some.ED

[hubel585]

Some more sabot and slug ideas, discarding types
and locked on base types.

First picture of 20ga Buckhamer pulled apart. The bunch
I have were pulled apart, the slug won't lock back in
tight, into the base.



Second is various 20ga sabot/slug ideas some using
buckhammer sabot bases that a bunch of 458 cal lead
slugs and jackted slugs I have, lock into real tight.
The 458 lead ones are 400gr, jkt are 350gr.

And I got some empty SPW 20 gauge sabots, and 20ga
Buckhammer slugs lock into them real tight.I have
many of these slugs. These slugs are 440gr.

Also is 3" 20ga FED factory sabot shell and one of
discarding sabots out of the case. Also a 3.5" 20ga
Hastings 3.5" load with black locked on base sabot,
and sabots out of the case and couple 20 brass
3.5" RMC cases.



Next is variety of 12ga sabots with 50cal slugs
in them.2 white and the pink sabot are FED, The black
is Hornady, With a 50cal long bullet .
The grey, is a BPI with .504" cast 440gr slug.
I wish the BPI was full size like the others
and fit rifled barrels tight for accuracy.........



Last 12ga SPWs from Slug-R-US(30 cents ea) with various
50 cal slugs locked in tight, and shown with one out of
a factory load, the dark colored one. 50cal 385gr
Great Plains ML slugs lock in perfect for a lighter
loading. Other ML slugs will do and a few of
the Dixie Gunworks 50cal slugs lock in also...Ed

[hubel585]

Some more slug setups and ideas.

First is USS brand sabot that European cartridge has, without
locked base, a discarding 12ga sabot, with .629" brass slug.
It is as accurate in rifled barrel as its locked on base
counterpart, in smooth barrels. Up to 750 gr brass slug
I tested. 3 shots in an inch, 30yds.
Shown with BPI powder cup seals.





2nd is the USS slugs with locked on base for comparison.
With corresponding length cases they were designed for.





3rd are heavy solid tungsten slugs, the smaller .580" cal and
1200gr, the bigger ones .660" cal and 2200 gr.
A guy in Southern MI made a few for me to check out. Now these
too hard to fire fullbore, damage rifling, must be in plastic.
These are just what the super heavy slug guys might like.





4th is a 1000gr 58cal tungsten slug in a 12ga REM style
58cal sabot. Notice how short it is for being super heavy.