What I meant to ask was can you split a hull by too much tension?
I suppose it's possible.
I own a P323 also, and I've got the extra added strangeness that 3 of my 4 lowers aren't quite the same gage as the fourth. I think my genius father (the previous boat owner) had 3 of them replaced but didn't replace the fourth when he bought the boat. Whoops.
Regardless, I just do what everyone else says to do - get out on a beam reach in 20 knot winds and tack both ways, pulling the slack almost
entirely out of the lowers on each tack, making sure the mast is still centered. I've got a tension gauge, but I don't trust it to be particularly accurate.