AA#9's usually fills the case/compresses even within published data.
To me, that is engineered safety. Obviously not completely fool proof.

It's interesting how there's a fine line in what loads Bulge the brass beyond repair...and some not at all. Those who know, know that the maximum high performance powders loaded toward top end using Longshot, or Blue Dot are far too much. I have to assume the brass bulge is either directly proportional to the maximum pressure generated, or possibly how quickly the pressure builds. (Regardless of max psi)

Anyone found a powder that gives top end velocity while still preserving the brass? So far, AA#9 has done best for me, I've been able to consistently push a 180gr. HAP- HP over 1450fps without damaging the brass. This is making me wonder if 2400 will shine in 10mm for the Banshee. I even considered the one piece of data out there for WW-296 to see what happens, im assuming it will be too slow though.

I shoot primarily Glocks (20 and 40) and have Alpha/Lone Wolf barrels in them for better chamber support. This helps with brass life, especially with "full power" to "nuclear" loads.
Keeping the majority of the everyday shooting loads a step below the above mentioned power settings helps with brass life a lot.

In the CMMG Banshee, the brass is only good once unless you keep the loads under approximately medium- medium warm. Anything with top end Longshot, BlueDot, etc. Will mushroom the brass near the case head similar to an Uzi. It's quite annoying and I didn't know of this problem prior to purchasing despite doing ample research on the gun.