Please help!! Problems with precise plus 18500

[Robbieadams25]

I got a P+ yesterday and for some reason to be its not hitting as hard as it should? I'm using a black ir 18500 battery and running a agaT+ with a 3/4 wrap of 30g reading right around .8/.9ohms. Can Somone tell my why its not hitting very well? I've also changed the o ring to the thick one and added a washer to the switch. Please help!