Mighty armory reloading dies

[jsanch03]

Anybody have experience with this company or their dies? I have Dillon and Redding dies for 9mm but curious if they are worth checking out. I get the occasional “Coke bottle” effect with both Dillon and Redding when seating bullets.

[OLD-skool454#3]

Are you sizing your bullets?

[jsanch03]

I have a mixture of NOS plated, FMJ and my own coated bullets that are sized to .356. I know various brands of brass have various thicknesses to them and when expanding/flaring not all brass is going to hold the flare I set it to due to spring back. Brass brands I have are win, fc, belom, blazer, and fiocchi

[ar15barrels]

The reason you get coke bottle is that the 9mm cartridge case is a tapered case but standard carbide sizing dies size them to straight.
This causes the cases to have a waistline instead of being properly tapered like new ammo.
It's not an issue.
The waist disappears when you fire the ammo.

[mofo1111]

I get the coke bottle look sometimes as well in 9mm. I use Dillon sizing die. I have never had an issue with functionality if my dies were properly set up. Sometimes when using moly(or any other coated bullets), the rounds would not pass an ammo checker, but they would work fine in my pistols or PCC.