I keep telling myself that I need one of these like I need another armpit, and that for what I hunt, and where I hunt it, it would be slightly less useful than a rubber crutch.

Then I catch myself looking at left-handed Savage 20-ga. bolt shotguns, and wondering......

Here is picture of a brake on 12ga FH with real hot loaded
hollowbase lead slug, brake needed more clearance
for  the expanding slug.




Here is the  before and after of  375 HE cases,   
 2 on left necked,  2 on right formed in hydro die after necking..



Here is pic of 416 HSM second from left we are experimenting
with, going to see if we can make the ultimate 416 ELR case.
Can be 3.60" to 4.00" long, a long one pictured.
Holds over  280 gr ball powder under bullet. In the picture,
1st case is 416 HE, 2nd 416 HSM, 3rd 375 HE, 4th 378 WEA.

416 HSM will get 400gr to 4100 plus without needing BMG action,
470 gr 3800 plus , it may be the ultimate target, singleshot 416..
Case will work in fat bolt actions, with heavy enough barrel
to have good, milder, barrel harmonics and srtill  be under 50 lbs.
A lot of the 2 mile type shoots are adopting 50lb limit.



Here is picture of  the 416 HSM fireformed once,
next to bmg case we make it from and as we
improve wildcatting process next few weeks
some specs may make small changes, now from
base to shoulder is 3.45", case 3.97" long. Ed..





Manson has 416 HE and 408 HE prints, as well as 375 HE
He can also make you a resize die reamer from that info.
We got 700 cases in 416 and one more pass if 408s wanted, ,
Going to do lot more cases for these 2 sizes also,
Questions, PM or email. ph 989-644-5228..

Here are final specs for 416 HE.
Length 3.32",  belt diameter  ,655",  base dia  .635" ,
length base to to shoulder 2.860" , 30 deg shoulder.Ed

Guys asking about strong economical bolt gun to use for  28ga and
410 ga and  32ga with brass cases and higher pressures than plastic cases.
They can use a MN bolt action, here is pic of one with
our 585 case in the action.Guys can get  Magtech brass cases or have
 RMC make them....Guys can make 32ga case from 500 NE,
410s from 9.3 x 74 brass, etc..



Here is picture of our 416 HSM case sectioned next to original
BMG case on the right sectioned, to show that we still have
enough thickness in the sides to handle  high pressure,
in a case with 310 gr capacity..We are getting the wildcatting
work set up so we can do at least hundred a month.
We have lots of 585s,  375HEs,  416 HEs,  408 HEs.....
And working toward getting 416 HSMs in big numbers.



Here's comparison of  416 target cases, 1st  416 HE,  have whole bunch.
Second is model of what I'd have made  on  medium machine, if I could, 
the 416 HE Long. It has capacity of  230gr..
Third is our 416 HSM which we are working on making by wildcatting bmg
cases, And if  had run long cases, make longer 375 HE necking down 416 ..




Bryan Litz just recently shot 3 shot group at 2 miles using Paul
 Phillips heavy barreled, target rifle built by Lethal Precision in 
375 Lethal Mag(585HE necked down, very  similiar to 375HE )...
 It grouped 17.5 inches tall by 22 inches wide.

Applied Ballistics shooter Mitch Fitzpatrick just hit 3 of 5 at 3520 yards,
 weekend 10-13th  at Valdina Ranch , west of San Antonio.
Also used the 375 LM case similar to our 375 HE
Great shooting at the 2017 World's Longest Shot Challenge. Ed

Here is case measurements for our 416 HE target case
made by necking our 585 HE big belted case.




Here is picture of 375 HE left,  416 HE next,  416 HSM on the right..




Here, tentative specs,  416 HSM case we are doing from bmg brass,





A  375  HE,  with Lawton action, few are being done with those,Ed .....

A 585 HE ...shot  with moderate heavy load......

https://scontent.cdninstagram.com/t50.2886-16/20404363_470558053312276_3772630570509533184_n.mp4


Here is a 375 HE target gun  set up, by Asteroid Precision...




Here is video of it being tested... And with a 350gr bullet about 3450-3475,

bolt opened easily with one finger...And he's  just getting started

and is checking on  better powder, Ed..



https://www.facebook.com/AsteroidPrecision/videos/298031133934093/?fref=gs&dti=321360231548869&hc_location=group
   

Owie .  .  .   

Wouldn't that depend on what you're shooting at ?        I'm guessing if its either "LET'S EAT!" or "SAY HELLO TO MY LITTLE FRIEND!" - I'll take the thump and deal with it later but I have to admit, it doesn't look like much fun. 

Ok, so it needs an airbag.   

Oh you slow it down a tad and  2-3 lbs in the butt

and they shoot just fine. Get it down to  12,000

ft lbs instead of 14,000,Ed

Thanks-  You find one I''ll hunt it..

Here in picture of the cases, are shown the steps in making

our 416 HSM case, from BMG brass,, Ed




We might have a company that is doing a bolt gun with an action

between BMG size and longer rifle actions used for 375 HE,

375 Lethal, and Cheytacs.. To use for our  416 HSM without

having to do extreme rebating of the rim.


Here is picture of 620   416 hsm cases half done. Done on cnc ,

that slimmed them down, cut new rim and extractor groove.

There are over 500 more at cnc getting done now, plus we  have

1000s more bmg cases we make them from, when needed..

This case is public domain and if anyone wants to make

them we can give the steps involved...Ed.

Here is a drawing depicting the layout of  thick and thin sided cases,
like my 585/375/416 HE thin sided ones and the thick one in picture.

And my 585 case is not perfect,  as where it transitions from the
heavier corner to the side it isn't gradual, so case separates there
shortening  case life. There are others made that way including brand X.
The dotted line is what it should be............



Others have sent cases to section and look at, that are built thick sided and they
stick also for the folks, If a longer case with about 5 sq in of side surface sticks and
don't spring back, the coefficient of friction is about .01 then the pull needed to move
 it is 2500-3500 lbs..That is for big cases with normal amount of slant to the sides.

Here is picture of  six nyati and gibbs size cases sectioned.. the5th one is present 585 HE
and 6th is thick sided version. 1st  600  OK which essentially nyati basic case left straight, belt added



In the picture the nyati gma is one we built most of our first 585s on. Before we had factory run.
Reworking made it in size that is my 585 HE,  but that brass had the sides of perfect thickness,
not too thick, but thin without sharp transition my new factory 585s had, they  last forever as 585s......

 Fourth one is an older nyati case I used to make about 10 of my 585s from,had thin sides, heavy corner
and sharp transition from the corner, tested  20 years ago, and they would separate after 4-6 hot loads
as 585s, my factory 585 with right powders, as a 585 will get  10 hot loads, and necked down to
416/375  4- 6 hot loads, right powders used, Moderate 577 equivalent,  factory 585 at least 20 loads..Ed.

Here is picture of  thick 375 case sent to me, with thick sided trex  case, and our HE case,
The thick 375 case is .050" bigger OD base, but inside is no bigger than HE cases..
These thick sided 375s stuck for the guy using them, when loaded over 44,000 psi....



Got guys asking and doing it,  to do 416 HSM  case for BMG actions, so  leaving rim same,
as  the original bmg rim, so  will neck them,  fire form to the longer shoulder, like the others. 
Base a little bigger, Shoulder  same diameter,  same 30 degree slant, neck will be same..

Inside of case still has close to same shape, volumne within 3 % as ones we slimmed down more.
Some want to use bmg actions and can't wait for intermediate actions, or already have bmg action.
And they are really getting interested in the complete line of 416 CEB bullets now being done
clear up to 550 gr...

So there will be 3 versions, one for actions  .750" bolt, one for  .800-.850" bolt, 
And one for bigger bmg bolts. The ones for BMG called 416 HSM2 ..

Here is   416 HSM  guy working in a Montana PH, in a heavy thumbhole target stock. Ed

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