From: ahahma@utu.fi (Arno Hahma)
Subject: Re: Bullets keyholing
Organization: University of Turku, Finland

In article <2ri4gf$obp@tadpole.fc.hp.com>,
Bart Bobbitt <bartb@hpfcla.fc.hp.com> wrote:

#Cast pistol bullets usually keyhole for one, or a combination of, these
#causes:

<two causes deleted>

I'll add another one. The rifling twist for the 9 mm pistol might be
too low to stabilize the bullet, especially, if the bullet
has a flat nose. I had the same problem with a Bernardelli and I
corrected it by increasing the powder load until the bullets no longer
keyholed. The seating depth was kept constant (as long a cartridge as
possible).


ArNO
    2