Point Forming Die, Type -S
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Catalog No.: PF-1-S
Shipping Weight: 0.50 pounds
PF-1-S point forming die smoothly shapes the ogive
or nose so there is no shoulder between the shank and the
nose section. The point forming die must be closely matched
in diameter to a core seating die or the RBT-2 rebated
boattail die set diameter in order to produce a straight
shank and proper final diameter.
When ordering a point forming die by itself, it is helpful
if you send a seated core ready to go into it. The die-makers
can then use this sample (or better, half a dozen of them)
to actually make a bullet and test the die using your
materials and the amount of pressure you use when seating.
However, you can order without sending samples, and in
most cases if you use standard Corbin jackets or a lead
bullet is being made, the results will be satisfactory.
The exact diameter can only be guaranteed if we have the
sample seated cores for testing, or if we are also making
the core seater or RBT dies that go along with the point
former, or if you send us those dies so we can make samples
for ourselves in your dies. Then we have the "whole picture"
instead of just part of it, and can take full responsibility
for the final result of using the PF die with those
components and precursor dies. Otherwise, all we can do
is guarantee the die cavity shape and size, not the bullet
you will get out of it.
A point forming die is built using a series of reamers and
laps to form and finish the cavity. These tools can cost
more to build than the price of the die, so there is a custom
cost involved in making calibers and shapes other than
the standard ones we normally build. Custom shapes or
diameters add $150 to the die cost, to help defray some
of the cost of making custom tooling.
Point forming dies normally use a standard diameter of
oil tempered spring wire as an ejection pin, to push the bullet
back out by its nose. This leaves a small flat on a lead
tip, and limits the minimum tip size to that of the ejection
pin itself, but is normally acceptable.
PLEASE NOTE: Ejection pin wire sizes are matched
to the nose shape and caliber to permit reliable ejection.
If you select "standard" we will use the customary size for
the caliber and shape you specify. If you select a diameter
that is too small for the shape/caliber, we will try to
contact you first and make sure you understand that it
probably won't work, and isn't guaranteed to function in
that combination. For instance, a 0.049 wire in a .224 or
larger caliber is not strong enough for the ejection force
and will bend or penetrate the bullet. It is strictly for
sub-calibers. The 0.061 is used for most .224's, and some shapes
of .243, but other shapes may require a larger 0.071 size
for reliable ejection. Bear in mind that ejection pin spring
wire has a 0.0005 tolerance plus or minus, so it
may be 0.081 or 0.082, and is actually the same thing and
will work fine either way. Some dies may be marked .001 larger
or smaller than the replacement wire, but that is within
the tolerance band and isn't an issue.
A smaller tip, or a more smoothly finished flat tip, can be
made by fitting a honed ejection pin to the die, with an
adjustable or synchronized pin length that places the end
of the pin exactly at the apex of the cavity. This additional
work results in a sealed chamber for the cavity, allowing
the tip of the bullet to press against the end of the pin
at the exact point of insertion where the entire surface is
in contact with the bullet material.
The synchronized length, precision fitted ejector punch adds $70 to the cost of the die
set, and is primarily used to make flat lead tips more
quickly (one less step) than when adding a lead tip die, or
to make a somewhat smaller tip than can be achieved without
fitting the tip to a cavity in the end of the punch. This is included
in the cost of the "bleed hole" die, because in order to use extrusion
pressures in the point form die, the die must also be sealed at the tip
with a punch honed to exact fit to the ejection pin hole, and the punch
must also be synchronized in length with the die cavity so it forms a
perfect seal at the tip. You do not need to order both the
option for jacketed lead tip and the bleed holes.
The external punch should match the shape of the base,
which is formed in the jacketed bullets in the prior
stages. With lead bullets, the external punch may be used
to form the base entirely in the point form die. Typical
base shapes are flat, RBT, BG, cup, hollow or dish base.
Custom external punches add $70. A custom punch is one in which
the dimensions of the cavity are specified rather than
checking one of the standard design types. For instance,
if you want a cup base that has a specific depth and radius,
with specified margin thickness, this would entail making
up prints and show drawings, setting up and manufacturing
the punch for you, rather than using one of the standard
shapes made in large runs and finished to fit the die.
For faster production of lead bullets, bleed holes can
be made in the shank portion of the point form die. This
eliminates the need for a prior core swage operation in
a CSW-1-S die or LSWC-1-S die. Bleed holes add $170 to the cost
of a point form die, and a synchronized and hone fitted
ejector punch is included because it is required in order
to pressurize the die enough to use the bleed holes.
Custom shapes of ogives, other than those which are Corbin
"standards" like the 6-S and 1-E rifle or 3/4-E and TC pistol,
require manufacturing a set of reamers and laps before the
die cavity can be cut and polished. A diameter that is very
much different from standard size also requires production
of a set of reamers and laps. Either a custom diameter or
a custom shape (or both) would be $150. If you want both a custom
diameter and shape, it is just one set of custom tooling,
so the price is still just $150.
For instance, a .308 6-S or ULD ogive point former is a
standard shape and caliber that we can ship from our
inventory if we have extras. But if you specify a .3086
diameter bullet and a 6.5-S ogive, or send a drawing that
would require something other than our standard product
size and shape, it is a custom job.
See standard ejection pin sizes
Custom Point Form Die, type -S