Sign in to follow this  

700HE and 12GA FH

Recommended Posts

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[/IMG]

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.

Share this post

Link to post
Share on other sites

Guy sent thick sided 375 case, next size base  diameter up from Nyati.He said,
'Yes I ran them in a ___________ rifle built by ____, the best I 
could get was 44000 psi, any more and they were stuck''

Big bore guys. other forums over the years related that trex/african case in 585
size, thick sided cases, stuck when they loaded them over 45k psi. 

Another just sent us,  thick sided 375, long case, same base OD as our 585 HE,
416 HE, 375 HE, and Mitch's  375 Lethal, and the thick ones stuck  over 45k psi.

Now you can fill those cases up, with ultra slow enough powder so they won't
stick, but powder is too slow for max speed. Might get a little more 
speed, with thick sides case, but case got to be  4- 4.5  inches long..

. Anyone needing a sectioned case of the ones I made the first of my 585s from,
 contact me, if they want to get a general idea of what case side thickness should
 be, in Gibbs size cases on up to about trex and 375 VM size case diameter. 

Here is pic of our 585 based case next to brand X and thick ones, both have 
same sharp, thinner, corner, where transition from heavy angled corner, to the
 side, the carbide draw rod could easily be reshaped with diamond wheel,
 just by grinding off sharp transition corner.  Then sides would be perfect.., . 

Here is picture of 416 HE in a Choate target/varmint stock guy is doing,
using long action BSA U9 action.Setting in stock ready to do bedding..Ed

Share this post

Link to post
Share on other sites

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

Share this post

Link to post
Share on other sites

Here is sectioned 585  HE case in the middle, we first  made from

another case, years ago  before we had factory run of brass and

 it had perfect thickness on the sides and inside corrner.

We could fire them many times without sides thinning..

First case is  factory run of  our 585 HE,  3rd  is case that is too 

thick of  sides and sticks at high pressures..


Pic of  our factory run cases necked down to 375 and fired 4 times

at high pressure on the right,  with unfired case on the left. 

Our case is not perfect but does work...Ed


Share this post

Link to post
Share on other sites

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........  .. .. 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

Share this post

Link to post
Share on other sites

intermediates.jpgExperimental 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 and .800" bolt, with locking lugs nearly as big as most

BMG actions.... ED

Share this post

Link to post
Share on other sites

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..[/IMG]

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


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

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

 Action worked fine.. Ed.

Share this post

Link to post
Share on other sites

Here is video of early water barrel test of the 

12ga From Hell, from years ago.

Here is picture from that video..

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

Share this post

Link to post
Share on other sites

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

with plain barrel, no brake, on intermediate action,

Now my 416 HE gets same 415gr bullet to 3300.Ed

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this