Here is picture of my 416 HSM test gun,... It is a big falling block we had
as a 8 bore years ago. Has a 34 inch , 1 5/8 "diameter, 1 to 10 twist barrel. .. Ed.
http://www.gunownerstv.com/hsmfb.jpg
416 & 460 HE AND 416 & 460 HSM .LONG RANGE AND HUNTING
Can be set up in *Pierce *X10 *ACTION for the 416 & 460 HE *
AND X20 action for the 416 & 460 HSM , Can get those
if guys need one...Ed
Here is experimental action for 416 HSM in a heavy
stock....We lengthened port a little, set bolt stop back ,
opened bolt face fit the 416 HSM rebated rim. Ed.
Here is comparison of Montana PH to Pierce action we
modified to use for rebated rim 416 HSM testing..Ed.
More info on this gun, we did it for testing 416 HSM with a rebated rim,
to check in intermediate size actions, with the longer, stronger, bolt lugs, Ed..
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..
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...
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...
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...
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..
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...
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..
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...
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...
.....
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"...
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...
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...
Here is video of early water barrel test of the
12ga From Hell, from years ago.
https://www.youtube.com/watch?v=c48zTpsgbuk
Here is picture from that video..
Here is the intermediate size action for 416 HSM with test barrel, .Ed