Ala Dan
Member in memoriam
First, let me state that I had NO idea of the amount
of different headstamps in the 9m/m caliber. Sorting
through a quanity of mixed 9m/m range brass, this
quickly got my attention! Win, R-P, FC, Federal, IMI,
Geeco*, and the list goes on and on. Anyway, I am
getting ready to load a batch of 9's; and I read that
there is a wide variation regarding case length, even
amongest the same manufactuer? In this case, the
writer said his 9m/m firearm prefered both, Win and R-P
cases that measured .750 in length. He went on to
say, that he settled on an OAL of 1.130.
Here's where the kicker comes in! He stated that with
the 9m/m, a cartridge that has an operating pressure
in the 20-25, 000 range; given a small increase in the
seating depth (he used .030") would increase the CUP's
to up over 60,000, and would ultimately destroy your
weapon. My question is, is this information correct?
I realize that in most instances the 9m/m is loaded
as a "compressed load"; but I never thought about how
dangerous the 9m/m could actually be.
The article went on to say, that his 9m/m (unknown
make or model) functioned best with Hercules Unique;
or what is known today as Alliant Unique. He stated
that he achieved greater accuracy from the flake type
powder.
*FootNote- "Geeco" what outfit produces this ammunition?
Reminds me too much of Geico Insurance!
Best Wishes,
Ala Dan, N.R.A. Life Member
of different headstamps in the 9m/m caliber. Sorting
through a quanity of mixed 9m/m range brass, this
quickly got my attention! Win, R-P, FC, Federal, IMI,
Geeco*, and the list goes on and on. Anyway, I am
getting ready to load a batch of 9's; and I read that
there is a wide variation regarding case length, even
amongest the same manufactuer? In this case, the
writer said his 9m/m firearm prefered both, Win and R-P
cases that measured .750 in length. He went on to
say, that he settled on an OAL of 1.130.
Here's where the kicker comes in! He stated that with
the 9m/m, a cartridge that has an operating pressure
in the 20-25, 000 range; given a small increase in the
seating depth (he used .030") would increase the CUP's
to up over 60,000, and would ultimately destroy your
weapon. My question is, is this information correct?
I realize that in most instances the 9m/m is loaded
as a "compressed load"; but I never thought about how
dangerous the 9m/m could actually be.
The article went on to say, that his 9m/m (unknown
make or model) functioned best with Hercules Unique;
or what is known today as Alliant Unique. He stated
that he achieved greater accuracy from the flake type
powder.
*FootNote- "Geeco" what outfit produces this ammunition?
Reminds me too much of Geico Insurance!
Best Wishes,
Ala Dan, N.R.A. Life Member