12GA Rifle From Hell

I just want to know when you guys start necking down 20MM shells to fire steel core 223 rounds through the sides of tanks.

I think you should try, even if it is not possible.
 
A 223/20mm would be a bit overbore. Here is pic of
one necked to 50cal, that Bob Snapp made for a company
testing armour 40 years ago.50 bmg on left for comparison....Ed

20mm.jpg
 
Before it got cold again got little more testing done.
I shot 8ga Lyman 900gr wasp-style slug out of
the Enfield at 2350. I made it from heat treated
lead REM kiln gun slugs, and it went through 6 foot
of hardwood slabs in my backstop. Hit target square,
behind chrono, which is great from smoothbore.
It is hollowbase and seems very stable.And real hard.
I shot 3 shot group, with 12ga 525gr Lyman, in 87
smoothbore long barrel levergun, At 25 yards they
all made hole like cloverleaf. Used 3.5" RMC brass, with
Lyman in a WW12-114 shotcup, going 2100.Now my
87 smooth barrel is .722" at muzzle, .726" at breech,
so it gives tight support to shotcup and Lyman slug,
for fairly accurate load.....Ed
 
dcobler--Thankyou and if you or anyone needs any
help in the way of info or research just ask.Those of
us doing this are having fun and glad to help anyway
we can.ED
 
Here is picture of one of RIP's NEFs 12GA FH, with
a Vias brake installed. He had smith ream out a
50cal one to let 12ga slugs pass through...Ed

100_1845.jpg
 
The Vias brake bored out in above picture will help
RIP with recoil as he wants to shoot all heavy slugs
in the NEF Ultra. Guys like the Vias brakes.They
can be bored out and fitted to anything.
I just like ported internal brakes and more gun weight.

Here are some results( had 1 nice day) with 8 gauge and
10ga light slug loads of my testing. I call them my real
big bore varmint loads. A 770 gr slug in 8ga fired in
Enfield at 2400 all 3 shots nearly touching at 20 yds.
A 515 gr Lyman, NEF 10ga at 2400, same tight group
at 20yds. Lyman is originally for 12ga, but is fit in
10ga thickwall BPI shotcup cut off and slug glued in so
it is like a impact discarding sabot. Both smoothbores.

Smaller varmint load. NEF rifled 12ga with RG's 385gr
aluminum cored jacketed slug at 2700, 2 overlapping
and one half inch away using RMC 3.5" case. Ed
 
The three slug loads tested above are real
light recoiling, easy to shoot. I call
them my big bore, varmint slugs as they are
light for the bore size. Here is picture of
the 3 slugs for comparison. 1st is 770gr in 8ga wadcup,
second is 515 Lyman in 10ga wadcup, third is the
12ga 385gr HP with aluminum core. The 8ga wadcup
loses its petals going out the barrel, but
hollowbase 770gr slug stays straight.The 515gr Lyman
in the 10ga thickwall wadcup is also as a unit
nose heavy and runs straight. The Lyman is held in
cup with little plastic mender glue, so that it
acts like a Hammerhead and Lightfield slugs.Ed

bbvar.jpg
 
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Here is what a 600gr super hardened Dixie slug
at 29-3000 plus does to two mild steel plates with
2" wood between them. Fired from our long case
in the Savage.Plates are soft mild steel.
Anyone interested in the 12ga Encore
with 3.5" chambers, that I tested loads in,
it is on Gunbroker..Ed

bhole.jpg
 
Shot the NEF 8GA FH. That is the heavy barrel NEF
that was a 10ga.. I bored it out to 8ga and chambered
it for the heavy duty 8ga case. 770gr at 2200 out of
29" barrel. End of barrel has internal brake with 21
porting holes and with weighted thumbhole stock,
it handles recoil easy.Will have picture soon.Ed
 
Here is my 12GA FH Savage 210 with thumbhole
stock, I put on in place of first one that cracked.
Along with weight and heavy barrel handles recoil
great. It is a Boyd and came inleted for Savage
112, and I re-did inleting to fit 210 and
heavy barrel,and got rid of monte carlo
outline.Ed

sav12th.jpg
 
Here is picture of RIP's two 12GA FH NEFs.
Both are the 12ga Ultra Slug Guns.
One has Vias brake, other expansion chamber.
He calls it his golf ball launcher. Ed


100_1870.jpg
 
I've got to admit that I'm extremely impressed by all of this. Showed my buddies at work to the sound of much "ooing" and "awing" Great job man.
 
I found a shotgun primer that will ignite rifle powders,
like RL15-19, IMR 4064,4198, etc. With regular shotgun
primers I had to use Blue Dot starter.
But not with these.....They are the industrial
shotgun primers used in the 8ga kiln gun cases. I use
these cases with basecup reduced in my 8 gauges.
When I set up first 8ga I fired the primers only to test
firing function(cases came with primer), then I put
regular 209 primers in to test loads, with 4759 powder.
Found box of WIN paper case kiln 3oz loads and took one
apart and noticed it had 94gr of some ball powder.
I wondered what powder is and how a regular shotgun primer
could ignite that, based on our need for starter powder
using regular rifle powders. So I fired that industrial
primer and flame and sparks came out of 8ga NEF barrel
2-3 feet. Put a regular primer in same case and flame
just a few inches. So I took REM kiln case with original
REM industrial primer and 2-3 feet of flame,and put regular
primer in and just few inches of flame. If anyone got
info on th powder used and how to get these primers,
let us know. I took some out of 8ga and put in 12ga plastic.
Using these hairy industrial primers today fired 180gr
of RL-15, in 12GA FH NEF, in 3.5" plastic cases with
437gr Brenekke KO slug. Got perfect ignition, no starter.
140gr with 600gr dixie, perfect ignition.
Also I have the 12ga Encore that we tested loads
in, on Gunbroker, in shotgun singleshot section.Ed
 
Do you guys know where one could purchase sabots that could be used to load 12ga shells with something in the 30-45 caliber bullet range?

I'm thinking that if a 12ga can fire a 385gr slug at 1900 fps then it ought to be able to do wonders with a 150-250gr bullet.:eek:
 
The only 12ga sabots out there so far that I know of,
are for 50 cal slug/bullets. Like the BPI shown earlier
in thread. Maybe there is a 50cal sabot that holds
30 cal bullets and put that in 12ga sabot.Ed
 
The only 12ga sabots out there so far that I know of,
are for 50 cal slug/bullets. Like the BPI shown earlier
in thread. Maybe there is a 50cal sabot that holds
30 cal bullets and put that in 12ga sabot.Ed

I thought about the double sabot idea but considering that the major manufacturers have enough trouble getting reliable sabot separation when using only one, I can't imagine the trouble with getting TWO cleanly away. I suppose it might be possible to glue the two together.... hmmm....
 
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