Petri Lite 24mm getting quite warm, I can't figure out why. My build is a dual clapception build coming out to .28 ohms

I'm using an LG HB6 battery which has been rated at 30 amps.

This battery should be able to handle this build no problem. But the tube is getting quite warm after a few drags.

This is my first hybrid mech so I'm trying to be extra safe.

I've used this battery in another device before, and it hasn't given me any problems. 

Should I be concerned or do hybrid devices just generally get a bit warmer?

The battery is also fully charged to 4.2 volts according to my Efest LUC V6 charger.