12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

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hubel585
Posts: 169
Joined: Tue Aug 30, 2011 4:27 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by hubel585 »

One of our sabot testers with tight barrel, 12ga Abolt, with wide lands in
the barrel, who couldn't do any good at all with our sabot and Alliant Steel
and one type of slug, had to go to IMR 4759 & different slug.
It would twist up the sabot petals. Terrible accuracy.

My guns have NEF/Sav size barrels and worked fine with Steel as well as 4759.
Petals open perfect here. The Abolt barrel about .005" smaller than NEF/Sav and
the lands over twice as wide as the NEF. And has real narrow grooves.
Guys with Nefs say sabots open fine like ours here.

He went to different Minie slug and our slow powder loads using
IMR 4759 powder up to 78-79 gr and finally got down to 2.5" group, I told him
go to max which is about 80-82 in 3" case.That barrel is like a lot of
EU made barrels and many are replacement or add on barrels in many slug guns,
and that is reason why it is so hard to get accuracy across the board in
sabot shooting in all guns--Takes a lot of work.. Another tester with NEF 12ga using
Alliant Steel with sabots got good groups like we did here. I tell guys if
problems occur go to 4759.

What was happening to sabot petals in the barrel, with the extra tight fit and
wide lands were petals twisting.. The wide lands were not cutting into the base of
sabot like in NEF/Sav210 barrels. The twist effect of rifling was on the surface
of petals, twisting them. It was not getting good hold on the sabot body. The
4759 starting slower allowed the sabot to get its spin started up to speed
with the wide land rifling and narrow grooves..It is just the opposite of
way NEF/Sav 12ga barrels are done. with narrow lands which impress into
the sabot base the way it is supposed to work..I showed pics above of the
good rifling marks impressed into our sabots.

I think after this experimenting run I feel that a lot of accuracy problems
across the spectrum of barrels are due to barrel differences, and not just
the differences in factory slugs and/or reloading components.

Here is pic of bag of our 585 cases with plain head if some need them for
wildcatting.We have quite a few. Fifteen have 585HE cases now. 585 gun
building is accelerating. We can get folks going with 100 cases, dies, and soon
a barrel; and shipping, for 750...Ed

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hubel585
Posts: 169
Joined: Tue Aug 30, 2011 4:27 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by hubel585 »

Here is picture of our 12ga sabots with the marks that the barrel lands made, marked with
black marker. The one with narrow mark is Savage barrel and one with wide mark is
an Abolt barrel. And the ones fired in Savage and NEFs with the narrow lands the marks
impressed into the plastic getting good bite and not twisting the petals. The one from abolt
he used slower powder for easier start and it open petals ok, without twisting petals like
the faster powder did for him.

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..
Next is picture showing top edge of sabots. Our sabot on left you roll crimp down over
the inside of it a little . We have lots of them yet.
The other factory sabot they crimp real short and sharp
180 degree crimp down on top of it.

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We see a use for modified 585 application in Indiana deer hunting. Mainly shotgun only, but
they also allow rifles with over 35cal pistol calibers; and any over 35cal rifle with a case
1.8" or shorter, usually short wildcats. So we have the the 585 HI... The I is for Indiana.
Here is picture of it next to the kinda little 500 S&W. 585 HI holds over 80 gr powder.

Next picture is a Magtech chambered for it. Gets 440gr Minie over 2,100 fps.
The .585"- .587" Minies of 440gr, 540gr, etc work in it, and they're good deer slugs
We got other guns with it going into; bolt guns, like in the last picture,
single shots and checking couple lever actions.
Might work great in MNs many guys like....Ed

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hubel585
Posts: 169
Joined: Tue Aug 30, 2011 4:27 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by hubel585 »

In above post we compare the top thickness of sabots
.Here is comparison of the thickness of the sides of two types of
brass 12ga cases, the RMC turned case and the thinner
Magtech drawn case. Easy to see you can't size with same dies
and sometimes you have to use different wads..

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In posts earler in the thread you saw variety of wad columns with
12ga sabots and here is picture of my favorite wads to go between
seal and sabot. The white felt ones from BPI. They compress down
evenly on firing, easy to load, decent price,

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You've seen the work on our 585HE posted. Folks ask what case
I made first ones from and how. Here is a sketch showing the steps
I used to make the first 585HE from long basic straight Nyati brass.
The start of the belt step I put on the case where it is thick I do it
in my case spinner lathe I made. Then case is lubed and run into
couple swaging/sizing dies and comes out formed into our belted,
straight sided, 585HE case...... It is really faster getting a big
run of cases made in a factory.


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Shot a 12ga sabot load w/440 gr Minie bullet in smoothbore Rossi
in 3" case, Going about 1700... .. 4" group 3 shots at 30 yds.
Gun works fine, shoots nice. Got extra weight in the butt.
The Minie I used is a semi-round nose. If I had the ones of same length
with blunt nose, slightly heavier the group size would be smaller as
they'd be more nose heavy, be like Foster slugs..Ed
hubel585
Posts: 169
Joined: Tue Aug 30, 2011 4:27 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by hubel585 »

Another use for 58cal Minie Bullets would be to setup a 24ga FH.
Minie bullets cheap to cast and buy. We use the .575-.577" in our
12ga sabot, and the .585-.587 in my 585HE. And you could use
577 NE bullets also.

For those in shotgun only areas there is a way. You can get 2.5"
Magtech brass cases, but also you can set up a 3" chamber and use
577NE 3" brass. Grafs shows some under 4 bucks each. Cheaper
than getting them made. And if you set up chamber with shotgun style
forcing cone you could shoot shorter Magtech as well as plastic cases.
Reason to use 577 cases, they are stronger solid head, last forever,
and can be run higher pressures and still last forever.
You can get barrels, 58cal at Green Mtn I think. .We got some also.

AND the first batch 585 barrels from McGowen has got here, more
will be built.They are the regular 1 to 20 twist barrels, and we have 14
that are profiled and polished, and 3 others that are straight blanks,
1 to 20 twist. And 6 slow twist barrel blanks for guys doing mainly
Minie bullet guns, and bunch smoothbore blanks...Pictures soon.

Here are couple pictures of a 585HE gun a guy is doing with nice
walnut stock. Gun has extra bedding lug and accra-glassed.
It is an Enfield and has single stack magazine.

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hubel585
Posts: 169
Joined: Tue Aug 30, 2011 4:27 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by hubel585 »

Here is picture of 24ga FH in the Mossberg bolt gun. On a
Mossy 390 frame, .585" heavy barrel, same as 24ga size.
Chamber is set up 3" with shotgun style forcing cone,
so it can use 2.5" plastic cases and 2.5" Magtech brass
cases with slugs or shot and for 3" cases we use 577NE
3" brass. Really make a hairy 24ga using the 440gr to
540 gr Minie bullets at 21-2400. If you take 540 Minie bullet
mould and leave out base pin you'd have a 650gr that
would do. All these bullets and slugs as well as jacketed and
turned 577/585 bullets work in 24ga as well as my 585HE.
And the smaller Minies work in our 12ga sabots. I keep
saying 58cal is where it is at, and there are more bullet and
slug choices in the .585 size, easy to find, than any other
caliber over 458. And Minies are like 40 cents each and
cheaper if you cast your own.

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Here is picture .585" barrels from McGowen, with other barrels.
Most of the McGowens profiled and some straight blanks.
Others we have are the slow twist and smooth blanks...
In back some of the cases and die sets.

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Here is picture of an Enfield and a BBK in Hogue recoil
reducing stocks. These stocks are the rubber coated ones with
the easy to grip, nice pistol grip.Has McGowen 26 inch barrels,
1 to 20 twist, barrels are heavy profile and taper
to .980 inch at the muzzle. Guys are doing more Enfields
and other actions through the winter. Ed

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hubel585
Posts: 169
Joined: Tue Aug 30, 2011 4:27 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by hubel585 »

Some guys in 12ga like to use the Magtech brass cases
but the cases being brass the sides are thinner than
plastic, and that makes loose fit in 12ga chambers.
And cases expand a lot with heavier loaded slug
loads, are harder to resize, wear out quicker.
But I found that .750 hollowbase 10ga slug fits
those cases and still chambers in regular 12ga.
chamber, it isnt a sloppy fit.

So If you have a 12ga smooth barrel with full length
backbore job, of .850" bore or bigger you could use
the Magtech brass and .850" size 10ga hollowbase slugs.
Now these .850" slugs won't go in a 12ga plastic case
and chamber in regular 12ga chamber.And you do not
fire them through 12ga regular size barrel.

Brett in MN used the a BPI AQ slugs in his full length
backbored 12ga and got fair accuracy as he said the wads
under slugs expanded a lot for a decent fit.
The 10ga slug shown in the 2.5 inch Magtech is 800 gr,
and .850" diameter. These cases will take magnum
pressure so you can get good speed, for what this short
case can hold.

It is too bad they don't make 3" and 3.5" versions.
These 2.5" cases are easier to find and much less than
others, so if needing brass ones you can rig up guns
to work with them. To build a new barreled gun in actual
12ga size, IE .729" bore, you'd make chamber to
minimum specs so cases don't over expand.
In the picture are 2 10ga slugs on right, like in the case,
and 2 12ga jacketed slugs and one 12ga lead slug left.ED


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Here is the ytube URL again for our guy
shooting 585HE in his NEF----By mid summer we plan on a
pickup truck load of more 585HE cases coming in.

http://www.youtube.com/watch?v=HypaUdwQGAc
hubel585
Posts: 169
Joined: Tue Aug 30, 2011 4:27 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by hubel585 »

Here is good simple system with big hollowbase slugs to stop
the skirts from deforming, I found that dense dow foam works
good, I was using glue gun but dow foam is easier, Just cut
plugs out of foam sheet and force into the base. Make a tight
fit, use spot of glue inside, glue that is for foam....
Trim off the foam flush..In picture is 10 ga 900gr slug.

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How we get good 24ga plastic seals with protusion on
top that fits up inside 58cal Minie base, same bore as 24ga
and our 585HE. I get the 24ga seal by cutting apart the BPI
24ga Brush wad, getting two seals out of each.Works great
in plastic case giving a shorter column than other seals and
wads, so we can get in enough of our 4759 for good speed.
The 24ga idea is getting nicer all the time with
the variety of cheap 58cal slugs, and good 3" brass cases,
drawn cases, we didn't have to wait to get made.
And all kind of guns we can use, bolt 395 Mossbergs, single
shots of all kinds, Autos,, pumps. bolt action Savage,
even 1887 Win and Greener MKIII, bolt action JC Higgins. .

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Here is picture Khan auto we setting up 24ga FH, it is 3.5"
model, has a 12ga barrel to change with. Being 3.5" it
feeds/ejects through lengthened port 3" brass 24ga cases we
made from 577NE brass. We rework back of the bolt for
slightly longer stroke.Ed

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User avatar
SoupOrMan
Posts: 5685
Joined: Tue Aug 19, 2008 2:58 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by SoupOrMan »

You're talking about the bullets deforming when they're being loaded, correct? I would think they'd need to deform to create a better gas seal when fired.
Remember, folks, you can't spell "douche" without "Che."

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hubel585
Posts: 169
Joined: Tue Aug 30, 2011 4:27 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by hubel585 »

Both, with higher muzzle pressures they may deform unevenly when they pop out of
the barrel and/or the wad/seals get jammed into them and may not release or be
straight, so we figure to have something permanent in them that is straight, and
they still give enough to expand base to seal.

Here is picture of 24ga cases, loads; and some slugs and seals.
Brass cases are 3", plastic cases are 2.5". Brass 3" can be loaded
to match 577NE power.

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Here is of 24ga in an 87 Win, just test gun of mine. Uses same barrels
as our 585HE, This one has slow twist for Minie bullets.Our guys
have got supply of regular and slow twist barrels.

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Here is picture of the first 585HE done and shooting in Australia.
It is owned by the poster, 'tankhunter' on the AR forums.
Built by his smith who has a reamer.
Guys there can get cases from Bertram, and there will soon be three
reamers there. There is a company there now making 585 barrels,
Allan and Grant Swan. in Redbank, Queensland.....Ed

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hubel585
Posts: 169
Joined: Tue Aug 30, 2011 4:27 am

Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big bores--

Post by hubel585 »

Finally got back to forums.Been busy with 24ga FH and 585HE
and getting 585HE cases made, as many as possible...

We are now working a bit with 24ga FH and here is picture
of it with our 585HE case. Both use same bullets/slugs, same
bore barrels. Main use difference, 24ga FH easy setup in break
actions and 585HE in bolt actions and falling blocks.

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Picture of non-discarding 585/24ga sabot cup I found that holds
458 bullets and slugs tight. It had hammerhead type slug in it that
was pulled out, wouldn't stay in tight after pulled. Sabot was a loose fit
in 20ga, though made for 20ga, but small, so I shrunk the bottom rib,
fits perfect, super tight, in 24ga and 585HE. A press in fit gives
good resistance for good ignition.

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Here is another 24ga/585 sabot that holds .452" 45cal pistol
bullets. Made by Hornady for 58cal Muzzle loaders..
With 250 gr bullet in 585HE hot load will go about mach 4.

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Here is easy way to weight plastic stocks with hollow butts, use rubber
coated computer mouse balls, weight comes out perfect without being
too heavy if using that much lead.And coating keeps them quiet, and
we hold them in with piece dense foam under butt pad....Ed

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