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

hubel458

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About 416 cal bullets............

The heaviest 550 gr for Extreme ELR probably be best 8 to 1 twist , in 416 caliber bullet,
and 520 gr 9.5 to 1, and 470gr 10 to one, Some barrels I picked up are 10 to 1.......

Now a novel idea is to lighten rear of bullet with small shallow hole drilled in base, might do better
long range.which would allow 10 to one barrel stabilize the heavier 550 gr bullets for ELR.
Making bullet nose heavier makes it more stable in flight, needing less spin,
like our hollow base 585 cal minie bullets only need 48 to 1 twist, or less
while out regular 585 bullets need about 24 to 1 to stabilise them..............

The winner of the King Of 2 Mile shoot last week was using 416 Barrett with a 1 to 10
twist, with a 500 gr CEB Lazer bullet, ...Robert Brantley, with Manners Stocks....

Paul Philips was third with a 416...

GOOD NEWS-- There is now an importer and seller of our 585 HE brass getting set up here,
in US, hopefully will be in stock, few weeks........ http://bertrambrass.com .. .. Caleb Hallet..

Have got another intermediate size action besides the Montana PH our guys working on,
to do speed testingwith. It is big long REM style action that can take our 416 HSM, ED
 

hubel458

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Experimental intermediate size action with the Montana PH, for comparison.

It is an experimental action for our 416 HSM, to do our speed testing with

and get a better action than Cheytac size actions, for bigger case ELR use,

without going all way up to more expensive, huge actions.

It is big long round style action that can take our 416 HSM, almost

1.6" diameter action and .800" bolt, with locking lugs nearly as big as most

BMG actions.... ED


intermediates.jpg
 

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hubel458

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Here is picture of the bolt from the experimental action,

with our 416 HSM case in it. Note the amount of the

base size of locking lugs, the amount of area on the bolt..


interboltp.jpg



Here is link to guy doing special 585 HE in the EU,

Good pictures............www.585he.cz

We tested intermediate action with a 700HE barrel we had here.

Just temporary to test strength. 1000 gr over 3100..

Action worked fine.. Ed.
 

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hubel458

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Here is video of early water barrel test of the

12ga From Hell, from years ago.



Here is picture from that video..

Shot%203.jpg




Here is the intermediate size action for 416 HSM with test barrel, .Ed

intertargetp.jpg
 

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hubel458

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In 416 HSM got a 415 gr long target bullet 3800,

with plain barrel, no brake, on intermediate action,

Our 416 HE gets same 415gr bullet to 3300.Ed
 

hubel458

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Here is picture of our 416HSM cases with screw in shellholders,

for Ammomaster, etc, and slip in shellholders for regular presses

Also have some for big LEE Classic and Smart Reloader presses..

A 378 WEA MAG in picture for comparison...


Second is stacks of 416 HSM, about a third fireformed

and the rest to be fireformed... So far total about 1700, Ed



hsmholders.jpg




workinghsm.jpg
 

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hubel458

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Bob Snapp, 90, the great Gun Craftsman, of

Clare, Michigan, passed away Jan 28th....

He was an esteemed member of the

American Custom Gunmakers Guild,

Being its president in 1992..He liked

working with Martini Cadet singleshot rifles

.Worked with guys testing armor long time ago.

Maybe the 1st to do 20mm necked down to 50cal

We lost a great friend,,,Ed
 

hubel458

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.....


It is possible rig up holders for many types setups.,

About shellholder supply for big cases,

RCBS and others make slip in holders for shotgun cases

that can work or reworked for big rimmed rifle cases...

Here are various sizes.......

16ga-- .810" rim,........ 20ga-- .760" rim,....

24ga-- .725" rim,....... 28ga .680" rim....

Ch4d and Buffalo Arms also have these larger shellholders...


We fireform the 416 HSM with 65 gr of medium speed

surplus powder, with rest of case filled with farina

and grits mix, with a play dough plug in the neck.

It is loud, so we shoot it into big container through a barrel size

size hole, so the sound is muffled, so it doesn't deafen us..


It is great getting more companies making 416 caliber bullets,

long target and bore rider bullets. Ed..



....
 

hubel458

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Wonder if a PTRD with 5 ft long barrel is stable enough

for ELR , rebarrel to 416 and use our 416 HSM, 500 gr bullet ....

.Here is up north guy using 585 HE in a PTRD with inserts,

Light load.....Inserts are in the shape of the 14.5mm case....




HERE ia video, 585 Hubel Express and water jugs - slow motion

750 gr with 155gr RE17, just a moderate load.....Ed


 

hubel458

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20mm Vulcan is a big case that works ok, without having

the sides made too thick...They have thinner sides

than smaller cases guys are getting that have the sides

made too thick and won't extract easy or work with high pressures.


Here Barnard P Cheytac bolt that would do for our 416 HSM..Ed......

barnpchey.jpg
 

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hubel458

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Got guys doing various 416 HEs..

One just built a 416 HE, just been testing it a few days..

And using 168gr of HBMG 475 gr CEB, tested it, in good

conditions, 2 shots at 1800 yards and was within

a 1/4 of minute accuracy...A few shots at shorter ranges

had same accuracy. Ed..
 

hubel458

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More about our 416 HSM from BMG brass, and
our 416 HE & 460 HE from our 585 HE cases
Got reamers for 375 HE, 416 HE and 416 HSM,....

460 HE & 460 HSM are all spec'd, got HE reamer
soon have HSM reamer...Our HSMs have a Wea type
radius on the shoulder..

The fellow that set up our 416 HE in an ELR rifle
and got 1/4 min accuracy,
They got some game out west over 1400 yds..
.Here is the gun they set up.
Using a K&P 34" barrel on a BAT action.....Ed

jacobgun.jpg
 

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hubel458

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And have got 460 HSM specs setup, the impetus for that is some
asking about one and new great line of 458 bullets CEB now has.

It will hold more powder than the 416 HSM and will get
a 572 gr as fast as 416 HSM gets a 475gr.....Ed..

PS- Anyone asking about cases and dies for my 585HE we got them
and dies and some barrels here, Bertram has thousands of cases..
 

DieJager

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Beautifull works, very interesting.
 

hubel458

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The guys that did the super accurate 416 HE did another
416 HE that has an 8" longer 42 inch K&P barrel..

Used a Stiller action and same load with 475 gr bullet, as in
first gun and and gained about 200 fps with good accuracy.
3065 fps. Tested 2 groups of 3 and less than 1/2 min moa.

And loads they used are not the highest speed loads
the cartridge is capable of....Here is print with specs for
the 416 HE reamer chamber ....Ed....

416heream.jpg
 

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hubel458

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More about he guys that did the accurate 416 HE, they did a
416 HE that has an 8" longer 42 inch K&P barrel..

Used longer barrel and the same load with 475 gr bullet, as used
in the first gun and and gained about 200 fps with good accuracy,.
3065 fps. Tested 2 groups of 3 and less than 1/2 min moa.

And loads they used are not the highest speed loads
the cartridge is capable of....Here is picture.......Ed....


jacobgun2.jpg
 

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hubel458

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Away for a time, sickness..
Here is print with chamber reamer specs for the
416 HSM chamber..There are 3 base sizes we have,
depending on actions used. Got reamers for all 3..
Got cases for all of them..
Our cases are public domain, so that is why I post
info and specs. To help guys do their own setups.
Manson makes reamers I use,,, Ed.
416hsmream.jpg
 

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hubel458

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Here is reamer print with chamber reamer specs for
the 460 HSM chamber .Couple guys getting set
to do 38-40 inch heavy 458 target barrels...Ed....
460hsmream.jpg
 

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hubel458

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With 40 inch barrel 416 HSM ,475 gr, get 3650, over 13,000 ft lbs muzzle energy.
Got guys getting set to have 38-40 inch 458 barrels made for 460 HSM.Ed..
 

Gunnie

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I’ve got a 10ga 3 1/2” SxS and would settle for some quality loadings similar to those that would have been found when 10 and 8 bore was used as stopping guns. Mine started out as a 32” gun that was shortened with new beads installed. Couldn’t find anyone who could install rifle sights from my looking. I based it off of a departed friends Browning SxS 12 that was similarly done he took a leopard with. Modern slugs are available though plastic shells leave me cold and brass is available but only in 2 5/8”
 

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