ABOUT OUR  416 HSM, 460 HSM. 416 HE, 460 HE,  585 HE...

Been away few months, under the weather,,,,

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 setup and do the builds
and cases on their own if they want.

Manson makes reamers I use,,, Ed.

Here is print with chamber reamer specs for
the 416 HE chamber ....Ed....

YOU ARE WELCOME

Here is the neck die setup, with insert stems/plugs for the top that are set
about .020" steps to make 460, 416, 375 HEs shown behind,from  585HE cases.
It takes 5 neck dies for me  get from  .585 to .458,  then 2 more gets down to
.416, then two more gets  .375..One set of sizers does them  all,,Ed.

Here's how, size and seat 416 HE, one simple 1"  die,
I do primer work separate, not in the press. SO First with lock ring set, I size cases.
When coming back out of dies with case, we notice the case still well centered,
held straight, when it is down as far as the length of the 416 HE neck.

So we put washer or another lock ring on, same thickness as neck length,
below original lock ring, screw down tight tight in press,
SEATING HEIGHT  bushing  or a plug goes  in the top for bullet to push against.

After priming, loading in the powder charge, 2 ways then to go, one,
with tall press, carefully start(boat tail makes it easy)bullet in case by hand,
slide up in die, raise ram to to top, bullet seated.,  or 2 in shorter press, run case
up in press, about  4/5 the way, unscew bushing/plug, drop in bullet, put bushing in,
and raise ram, bullet seated , Cases sized so bullet is held by heavy necktension.. Ed.

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

Here is picture some of our 416 HSM cases after the first machine
and case lathe work that reshapes them and the next
 step is  necking and then fireform..Ed.

Dimensions of 416 HE, this case is 2.86" from base to
shoulder and the 375HE is 2.84",,Ed.  

Thanks..

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..

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..  

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.

WE ARE working on an octagon shaped action a little larger than

the experimental action above, It will do our 416 HSM  and  460 HSM'

And can still do  50 BMG and will be as stiff as bigger round bmg actions...Ed

The bigger experimental action will be  1.8" wide and have .920"  dia bolt.Ed

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