Need to buy a new trigger today.

[Zeneffect]

I think with a drop in you get a tighter geometry and trigger pull is what it says without adjustment. Functionally, they aren't much heavier but provide a wider option of trigger shoes etc. Never blew a primer before but the cheapest cartridge trigger I have tried has been a rise armament. I use both depending on what gun I pick up. Install is far easier with the cartridge obviously.