Before Mike McNett started double tap, he asked me how I was getting so much powder to fit in 10mm. It is with double compression.
I use the same trick to get the most out of 9mm.
The hottest published handloads for 9mm are with old load books and 3N37.
The hottest possible handloads for the 9mm are with Power Pistol.
Alliants max load for 9mm 147 gr Power Pistol is 5 gr.
CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information.
I do 9mm 158 gr XTP 11 gr Power Pistol 1.169".
If I put a 48 pound triple recoil spring assembly in a Glock 19, the chamber will come up empty after firing because the slide moves forward too fast to pick up a round.
If I put two magazine springs in parallel, the chamber will be loaded.
But the trigger does not reset.
So I put in a New York trigger.
Now the Glock 19 is set up right for about half the 11 gr load.
And I am the only guy I know strong enough to chamber a round.
And loading the magazine is murder on the thumb.
What does it all mean?
Recoil is the real limit in semi auto pistols, from 25acp on up.
Most people think that pressure it the limit, and they are afraid of pressure.