Punch Head Extension, -S
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Catalog No.: PUNCH-SE
Shipping Weight: 0.10 pounds
PUNCH-SE is a collar or extension that goes around the
tail of a type -S internal punch. It extends the length of the
punch head, so that the punch rides higher in the press
ram, and therefore, is positioned closer to the die mouth.
This collar rests on a shelf or step within the S-press ram, raising the punch so the top end is closer to the die mouth, which in turn makes it possible to
make a lighter bullet with the same die and external punch. This collar is ONLY used with the following kinds of dies:
While it is possible to use the collar with other kinds of dies, such as a PF-1-SB or PF-1-SP bleed hole point former, such use will interfere with the
precise synchronized punch length and generally will not give satisfactory results. It can be used on a BT-2-S die but would not work with the BT-1-S since
the BT-1-S has a fixed length to the boattail section, and the internal punch must be flush with the junction of the ejection pin hole and the end of the
boat tail angle. Be sure to read and understand how the internal punch operates in various kinds of S-type dies,
- CSW-1-S Core Swage
- CS-1-S Core Seater
- LSWC-1-S Lead Semi-Wadcutter Die
- LT-1-S Lead Tip finishing die
The extension clamps to the tail of the punch with a set screw,
so it will not fall off. The extension will withstand the
normal swaging pressures without deforming. The purpose of
extending the punch head is to make it possible to build
lighter bullets than might work with the standard punch.
If the external or top punch goes all the way into the core
swage or core seating die, with the length of core you are attempting
to use, and does not compress the core, then you can use
this extension to raise the internal punch position. Since the
collar comes on and off easily, you can use the same punch
for both heavy bullets (extension removed) or light bullets (with
the extension in place).
(The punch is shown only for illustration and is not included
with the extension).
The graphic shows the relationship between a standard punch, resting on the "shelf" in the ram, and the same punch with the punch head extension installed, on the right.
The "normal" punch is made for the average weight range. It drops back a bit from the bleed holes so that there is room in the die for heavier bullets or cores. But if you try to make a very light core or bullet, the top or external punch may have to reach so far into the die that it covers the bleed holes.
Now, the punch on the right (which is the same one as on the left) is held higher in the die by using the extension collar. Now the end of the punch is closer to
the bleed holes. It leaves less space in the die, so the top or external punch does not have to reach as far to make a light bullet. Now the bleed holes are open, and the only drawback is that the heaviest bullets are not quite as heavy as they could have been, before. Fortunately the collar can be taken off again if you need to make heavy bullets!