OK....if you're not sure about shooting, always stall, don't feed and test again in 20-30 minutes....that way you can see if the numbers are heading up on their own (indicating the last shot is truly wearing off) instead of seeing the effects of feeding.
I think IF you're able to test tonight (if necessary) you could give .5.....he has climbed from 84 to 158 so the last shot isn't doing anything at this point
He may very well bounce tonight since his body isn't used to getting into those normal numbers so I expect him to run higher tonight, but these cats like to make liars out of us!!
If you shoot, I'd grab a +1 and +2....they're good tests to get occasionally anyway to learn what kind of "food bump" he usually gets. It's helpful information for the future