I got the hammer on 87 beefed up to fire big primers.
Still testing plastic and turned cases in 87.
We are testing small primers with 10gr starter powder(Blue
Dot) and RE-7 and 15.Plastic cases max is 90gr RE-7 with
10 gr starter, turned brass case 110gr RE-7 10 gr starter.
WE had to go to starter powder as we was getting
delayed ignition and squib loads.
Testing the cases,plastic and brass with small
primers and starter powder ... A big find. IE, we can't do
this for reliable ignition if the cases
are ballon head, whether plastic or brass.The cases must have the area between side and
the pprimer at least .200 thick.One reason is
strength. And some plastic I have measured is
only about .060 thick there and the protrusion
in the center for primer is .140 above that
thickness.. So 10 gr of starter powder is
in a groove so to speak and not on top of primer!!! That isn't good. I cut the cases
off at the brass base, poured in 10 gr
of flake powder and saw how it laid
in the case. Nice thing is that a most brands of cases are thick enough, like Win AAs.
So far RE-15 and Blue Dot starter looks
very good, and easy on cases.Velocity as good as RE-7.Will keep testing and I ran out of
RE-12 and the shops have no more, So
it will be RE-15 which I think turning
out best, or RE-7 in smaller
amounts.Ed.