Only your blood level tests can tell you that. In my case with my open guns yes FMJ vs JHP is a huge difference. I only shoot outdoors. You could train yourself to hold your breath while shooting so you don't inhale atomized lead in the gas blowing into your face from your comp but...
You have to catch Atlanta when they do their sales. Recently they had 15% off their Elite 38sc + free shipping which ended up being basically the same as Eley. Plus they have a rewards program that can rack up discounts.
Go for the cheapest round unless you care about your lead intake. I shot 30k Eley before realizing it was elevating my blood lead levels. Switched to hollow points and it went back down. Best to just grab a press and load if you can!
Have tried Atlanta Arms Elite JHP and it works well - 3N38 powder so a bit more gas vs Eley (n105) which I'm sure your Limcat will like. Also JHP helps with accuracy and less lead in your comp and less atomized lead in your face. It's also what the AMU (Army Marksmanship Unit) runs. Like Eley it's USPSA certified ammo.