A project gun and ammo I want to build
Gun: Glock 20 with an aftermarket slide for a 5 inch barrel, chambered in 9mm Dillon.
Ammo: 9mm Dillon loaded with custom turned reverse ogive bullets (see below for profile) made from 99.9% C110 H04 full hard tough pitch copper, bullet weight of 90 grains, velocity of 2,000 fps.
I’m basing it on the old French THV bullet but a little heavier. I won’t have the base hollowed out.
The problem with the THV is that many of the pistols of the day didn’t feed it well.
But a Glock feeds straight in and necked pistol cartridges generally feed off the neck and shoulder, so reliability should be much better.
The French ballistic tests showed devastating wound channels with the reverse ogive design. It’s the principle by which the Lehigh Xtreme Defense bullets work, except better. The Xtreme Defense bullet uses the reverse ogive of the THV in the flutes but has the outer profile to enhance feeding reliability.
By ATF regulation should be 100% completely legal.
Infer the purpose at your leisure.