Why is so much 124gr 9mm available now? What happened to 115gr as the standard rd?

[GAgunLAWbooklet]

2 of my 9 mm pistols have shown a clear accuracy preference for 124 grain bullets, so I would pay a little bit more for it.

 

[MaxDram]

The 9mm Luger was designed for 124 grain bullets.

 

[Trader805]

I am aware of ammo seek.

Remember the original question was why 124 grain is becoming available. Now I know. Thanks everyone