FYI - I took your advice and ordered some V Max 55s. When they get here I'll load them up and test for accuracy. You take lung shots a lot, or are you neck/head shooting deer? I used to use SSTs in my 7x57, but picking copper pieces out of places far from impact changed my taste in bullets for that one...but man they were accurate.You stated.
You can't go wrong with the V-max and close range stuff that goes bump in the night that I will shoot at will die with whatever round comes at them from a .223/5.56.
I would not want to take a 40 gr or any weight bullet to the chest or face shot from a rifle.
You speak of POI difference but this is also bump in the night shooting.
Not going to be any difference at close range.
But to answer the question I LOVE my 55 v-max it is amazing.
If you like fragmented bullet stuff in your critter you shoot.
If you like a nice controlled mushroom the PSP 55 gr Hornady does that in critters.
If you have only 40's i would not hesitate to use those.
I have shot 40's from my 1:7 16" 5.56.
Not as accurate as a 55gr at 100 yards 55's can stay in the under 1" area and the 40's with no fine tuning are in the 2" group size at 100 yards.
Not taking shots at home at 100 yards though.
I kind of want to do some clothing penetration testing now with the 40 gr at close range.
10 feet from the 5.56 1:7 twist see if it splatters before penetrating.