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
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.Two plates are soft mild steel.
In hole nice and round. Out, in back plate jagged.
Anyone interested in the 12ga Encore
with 3.5" chambers, that I tested loads in,
it is on Gunbroker..Ed
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 24
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
4227 is a pistol powder. The pressure spike would be enormous with that much powder out of a shotgun length barrel.:scared:
Originally Posted by hubel458
4227 is just a powder with a certain burn speed like all the rest.
Its relative speed is about 250, the fastest shotgun powders are
about 7-800, 4831 rifle powder is about 100, the slowest bmg
powders about 70. All powder has about same energy per grain.
We can use so much more of the 4227 as it is slower in a much
bigger bore than a pistol.And 775gr slug is light for an 8ga.If you used
1500gr then you'd cut powder back about 2/3 as much.We lab tested
90gr 4227 in 12ga with 600gr slug and average of peak pressures
was under 15,000 psi. That is like some magnum factory slug loads,
of same slug weight,only we get 3-400 fps more. Not because of any
higher peak pressure, but due to slower burn rate powder the average
pressure the full length of the barrel is higher, thus more velocity.
And it takes more of slower powder to keep that barrel pressure
average higher. But we use this as a gimmic to get more velocity
without fear of to high peak pressure.I that load was the fastest
shotgun powder it would spike to over 100,000 psi.
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
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
I always felt that if some company would make powders like 7383
available it would be great. 7383 ignites fine with regular
shotgun primers in 12ga, but it is surplus and only a few of
us have it.It is a powder that has a lot of the deterrent inside
the of the material, not all near the outside like 99% of
all other powders whether spherical, tubular, or flake.
This allows easier ignition, but yet the deterrent still can
control the speed. Well the new RE-17 just out for 2 days
is setup like that. The surface of the RE-17 grains is
more porous than RE15, so that fact allows better ignition
even though a slower powder, and along with fact that company
got most deterent inside it still regulates speed.
Today I fired with regular REM and WIN primers in
plastic and RMC cases, a whole bunch of loads of RE-17,
with no hesitation or squibs or misfires. Loads ranged from
437 gr slugs to 750gr slugs today. All loads burnt clean
and I got in RMC case one of RG's 715gr jkt slugs to 2300
with 160 gr of RE-17. Using plastic you must have a strong
roll crimp with slug and wads tight.....Whoopee....Ed
I shot couple loads with regular primer with RE-17
and 1040 gr slug in 12GA FH NEF, and it does great.
Tested loads that were cooled outside a while.Perfect ignition.
I fired loads RE-17 8ga plastic,in my 8GA FH on new NEF long
heavy barrel that was a 10 ga and RE-17 is great. No hesitation,
it fires off as good in 8ga as the 4759. Remember
I couldn't get good ignition in 8g with 4227, but so far
RE-17 is magic. In 8 ga all it would hold under the 8ga REM
wadcup with 770 gr slug is 200 gr of RE-!7, with the
wadcup pressed down, compressed real hard,good crimp,
and it really bellers.2400 plus.Going by case
expansion about 20k pressure. Which don't bother
those one piece compression molded super strong
8ga REM cases. You must have real tight proper
roll crimp in plastic cases and good tight
taper crimp or rolled in crimp in groove
in the brass cases. In RMC brass I size it so slugs
have to be shoved in with press.In all of this
brass and plastic, no airspace use wads when needed.
And this RE-17 doesn't break up the kernels when powder
gets to a certain point, like the 7383 does, causing burning
rate to speed up more than what it was designed for.
I tested 7383 in my 700HE, and when up to 35-40k it's
pressure went up fast, much more than linear progression.
I still like 7383 at shotgun pressures, but I really like
RE-17.Just great fun to use slower powder, so that
we don't have to worry about fast, high peak pressures,
but yet get large volumne, pressure curve for good velocity.
Ok- for those who want to get into the 12GA FH and get
the long strong 3.85 inch cases Rob on AR got some made,
email him to deal to get some- firstname.lastname@example.org
He can also tell you where to get reamer.Ed.
Here is picture of another fellas work on AR forum,
of NEF 12GA FH, factory thumbhole stock
and a brake he built, with wide slots in top and round
ports on the sides. He is testing heavy slugs.Ed