Author Topic: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Big Bores---  (Read 38987 times)

Offline hubel585

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Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Big Bores---
« Reply #100 on: October 09, 2017, 01:03:51 PM »
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
   

Offline hubel585

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Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Big Bores---
« Reply #101 on: January 10, 2018, 01:28:12 AM »
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 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.


Offline hubel585

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Re: 12ga,10ga,8ga,4ga FH; 585HE/700HE; Big Bores---
« Reply #102 on: February 12, 2018, 12:06:49 PM »
For big long cases our testing is showing that the 416  easier to get powders to work with,  less problems ..
Maybe building a target gun,don't have  375 barrel all ready, maybe go 416....

We got cases, 416 HE and 416 HSM, as well as 375...
CEB and others will have bullets...CEB  will be doing .416 in  450gr, 475gr, 500gr, 525gr and 550gr

Got sent 5 thick sided sample cases, same OD base as  585/375.416 cases, same belt, just .180" longer,
 did a 416 HE, chambered extra barrel , cases stick over 50k. They have about .042" total taper,  .021" per
side, when I necked couple to 416. That is a lot of taper , twice the taper of my 416HE...hanging up at 50k..

I could maybe go to 65k with these if we made taper with ..012" - .016" more taper to each side, but that is
no way to build target cases. I'd have to crunch down case shoulder diameter. And would look like 30-30.

And crazy part is, the case has enough brass material to thin up sides and stretch them way out to 4 or
more inches,, They weigh 150 gr more than our 585/375/416,, but with real thick sides they actually
hold less than our 416 HE with thin sides, that is .180" shorter...Our case does 65k ok without sticking..

And we can make super long 4" cases work if we had means to get them built, as we have
15 powders slower than HBMG.Here is pic of thin and thick sided cases, sectioned for comparison.Ed..