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Sizing
Die
This custom resizing
die has some advantages over conventional
neck bushing style dies.
1.) On our
die, both the neck and shoulder are
included in the bushing, not just the
neck. This is a better design because it
allows excess sizing lubricant a place to
escape and not make a dimple on the
shoulder of the case. It also allows
changing the bushing to make a caliber
change (say, to a 6.5mmXC) or you can make
a shoulder angle change (say, to 45
degrees) and you can still use this same
body die. You could effectively use this
die for any caliber and any shoulder angle
as long as you use the .22-.250 as the
parent case. Click HERE
to see how to choose the right bushing
size.
2.) By having
an integral neck and shoulder bushing, the
entire case neck is able to be resized,
unlike a neck bushing full-length sizing
die in which the very bottom of the case
neck is NEVER resized. Plus, having the
neck and shoulder bushing consolidated is
an asset to alignment and preservation of
concentricity in the sizing
operation.
3.) Since the
neck and shoulder area are one piece, it
is also possible to adjust the amount or
extent of case body sizing and shoulder
set back independently, without
compromising and being unable to size the
full length of the case neck to prevent
having too much shoulder set back. I like
to have the full length of the case body
sized (die threaded fully down to
shellholder) and then adjust the height of
the neck/shoulder bushing independently to
specify the amount of case shoulder set
back (this process is explained on Page 5
in these instructions).
4.) This die
comes with two different bushings for use
in sizing, and a third bushing designed to
be used to determine cartridge case
headspace when used in conjunction with a
set of dial or digital calipers. The use
of this "gauging bushing" will be
explained later. The two sizing bushings
have different neck diameters and, thus,
will result in different amounts of case
neck tension. The bushing diameter is
clearly indicated on each bushing. Keep in
mind that the sized case neck will be
approximately 0.001 inches larger than the
actual bushing diameter; this is due to
spring back in the brass.
5.) This die
features a tapered expander plug (.17 cal.
to 6mm [.243 cal.]) to neck up the
parent case's .224 caliber neck diameter
to .243. The taper greatly eases this
operation and results in less stress being
placed on the case neck.
6.) The die
also has a separate decapping pin retainer
for use without an expander plug. The
expander should be unnecessary once the
case has been fire-formed (this retainer
won't expand the neck when you
resize).
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