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12ga,10ga,8ga,4ga FH;585HE/700HE, other Big Bores--

 
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  #8  
Old 12-02-2011, 07:39 PM
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Posts: 91
Re: 12ga,10ga,8ga,4ga FH;585HE/700HE, other Big Bores--

I get 3" -- 3 shots at 50 yds with bad eyes with the
full bore 600gr and some sabot combinations
with NEF. Ed
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  #9  
Old 12-03-2011, 12:36 AM
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Join Date: Jul 2011
Location: S.E. Missouri
Posts: 225
Re: 12ga,10ga,8ga,4ga FH;585HE/700HE, other Big Bores--

I'm curious as to what twist rate you guys have settled on. Are you using standard rifled-slug twist rates in the barrels?
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  #10  
Old 12-03-2011, 03:46 AM
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Join Date: Sep 2006
Posts: 91
Re: 12ga,10ga,8ga,4ga FH;585HE/700HE, other Big Bores--

With NEF 12GA Fh 3" group art 50yds with 600gr full bore slug
and some sabots, with my Enfield 585HE 3-4" at 100yds.
The NEF twist is 1-35, The Pacnor heavy barrels Rob and I got 1-20.
I have smooth bores also for testing those slugs made for them.

Videos--- Youtube blowing up 6gal pail of water -"Grandpa's Cannon"
"Grandpa's First Shot" 12ga FH -- 610gr HP at 2800-3000.

We get asked about legality and whether these big cartridges
are DDs. First of all; all shotgun calibers over 50cal are exempt from
being classified as DDs under Title 18 GCA Section 921....
And it doesn't matter what exciting or promo name we call them,
the barrels are still marked for gauge. They can be called 12ga 3 Inch
Super Magnum, 12ga Goose Magnum, 12ga From hell, 12ga 3.5 Express,
12ga Hammerhead, etc, they still are a 12ga case of some length.
And length doesn't matter as long as shorter cases, with straight
sides, and same 12ga(or whatever gauge)base size fit and fire in
longer chambers. IE; 2.5, 2.75, and 3" firing in 3.5", and all of these
firing in our 3.85" longer chamber. IE; you can't take 37mm cannon
shell and neck it to 12ga and have an automatically exempt 12ga
cartridge, as other shorter 12 gauges would not fit/fire in chamber,
and you'd have to get it exempt as sporting. How-
Under the same Section any other over 50cal non-shotgun
cartridge can be classified as Exempt For Sporting Use by
applying for the exemption, like I have done for my cases,and many
others(JDJ-AHR-Etc) have done, as well as cases already sporting
from the old days. Now as for hunting rules in shotgun areas,
game depts may say that you can't use long range spitzer bullets
but must use traditional blunt slugs, for safety. Hunting rules are
varied all over the place.Ed
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  #11  
Old 12-03-2011, 11:48 AM
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Join Date: Jul 2011
Location: S.E. Missouri
Posts: 225
Re: 12ga,10ga,8ga,4ga FH;585HE/700HE, other Big Bores--

"The NEF twist is 1-35, The Pacnor heavy barrels Rob and I got 1-20.
I have smooth bores also for testing those slugs made for them."

Does the twist rate seem to make any accuracy difference when using the short, blunt slugs? I know it can make a tremendous difference in the stability of a spitzer-type bullet. But I wonder if the bigger differences aren't in the length-to-diameter ratio?
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  #12  
Old 12-03-2011, 12:21 PM
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Join Date: Feb 2011
Location: alabama
Posts: 125
Re: 12ga,10ga,8ga,4ga FH;585HE/700HE, other Big Bores--

You must have a real qualified surgeon to put you back together. The recoil from those has got to be monstrous. Or you are butting the stocks up against a real strong tree when you squeeze the trigger.
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  #13  
Old 12-04-2011, 03:11 AM
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Join Date: Sep 2006
Posts: 91
Re: 12ga,10ga,8ga,4ga FH;585HE/700HE, other Big Bores--

With short 12a slugs up to 750 gr 1 to35 works good at our
faster speeds Now rolling them out the barrel at 1000 the
ones heavier than an oz will wobble/tumble.
The1 to 20 handles 1500 gr ok at decent speed.

Recoil--The guns are weighted according as the power goes up.
And double thick pads. Bigger ones ported. My16lb NEF can do some real
hairy loads and not be worse than a turkey magnum
load in a 6-7 lb gun that guys use them in all the time.Ed
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  #14  
Old 12-04-2011, 07:50 PM
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Join Date: Sep 2006
Posts: 91
Re: 12ga,10ga,8ga,4ga FH;585HE/700HE, other Big Bores--

Now some info on cases and slugs
The 50 BMG brass can be made into some real
great cartridges, our 12ga FH, shown first, showing
cases with rim turned off and threaded; and the 12ga rim
pieces to be screwed on, with finished cases shown.
And 2nd making my 700HE showing original BMG case,
case with belt only, and then expanded out to 700cal.
This makes a super strong big bore case, as I have
fired some 25 times and case is still good.And
it in my big Vulcan bolt gun gets a 1000gr to 3200.

3rd picture shows our 4bore/ga case with slugs, and
the 20mm case we make them from. They match the 4bore
turned cases that are used in the Ken Owen doubles.
4th the Rocky Mtn Cartridge, 12ga turned 3.5" cases
with variety of slugs and sabots.In picture first loaded
one is BPI sabot, then 730gr Dixie, then 600gr Dixie,
then RG Henson's solid nose and his hollowpoint.
RMC can make cases any length and any gauge.
5th shows a 12ga FH and 10ga FH we made using steel
basecups taken from 12 and 10 ga cases. We turned down
bases a few thousands of the original brass cases
and epoxied the bases. Used BMG case s for 12ga and
50cal Russian for 10ga.This research came from a
another forum poster, like over half of what we do.Ed











More pictures of 12ga slugs and saboted slugs.
1st The US-S sabot/slug, with the green locked on base,
along with others.The US-S slug is nearly as accurate
in smoothbores, for which it is made, as sabots are
in rifled. those pictured are heavier than most other
brands of saboted slugs.

2nd a Jacketed 730gr by RG Henson and a hard,heat treated
600gr by Dixie Slugs in FL, both full bore slugs,
3rd a BPI sabot with hardcast 440gr, .504"
diameter slug. BPIs were intended to use .500" bullets
used in 500S&W, the little larger ones we use seem
little more accurate.Makes tighter fit in rifled barrels.
4th other sabots we tested , 5th brass turned slugs
and there are many other slugs/sabots we'll show..Ed










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