|Roll crimping tips:
*Use new hulls
*Use moderate rpm and pressure for best results
*Make sure you have about 1/4" free wall height (on the hull) for rolling
*Put the hull in a Hull Vise to hold it steady during the roll crimping process.
Nearly all high quality double loads were originally roll-crimped. Earlier in the
twentieth century it was the custom of the day. Roll crimps also allow for maximum
utilization of the shorter hulls interior volume. Fold crimps require twice as much
hull length to establish the closure, therefore hulls and chambers must be longer to
accommodate this type of crimp. Fold crimping was a development in ammunition
manufactures quest for higher speed, low cost loading techniques. As such, fold
crimps function well. However, when weighed against roll crimps, fold crimps do not have
the same good looks nor chambering efficiency.
Twelve gauge roll crimping
enthusiasts have an opportunity to use a clear overshot disk as a "window" to
their loads. In the catalog we offer a clear plastic overshot disk that duplicates the
appearance and practicality of older cellophane discs. These were, and are, kind of neat
in that you can identify your loads by peering at the pellets within. Better than other
crimps, the disk crumbles into dust after the loads initial firing thrust.
Roll-Crimped loads are easy!
Roll crimps can be used on new hulls for an extra clean look. Roll crimps are
achieved by using a special bit that turns over the last 1/4" of a hull
holding an overshot card wad in place. The roll crimping procedure is easy: Place an
overshot card on top of the pellet charge, place the roll crimp tool on top of the hull,
start the drill (making sure it is turning counter clock-wise
as you look down from behind), apply
light pressure. Check progress as you go along and you will develop a "feel" for
how it is going. Roll the lip down until it makes contact with the overshot card wad.
Youre done now.
here to see the Roll Crimping Movie.