"Do you have as narrow a sheeting angle as possible, usually provided by inside tracks ( a track located along the cabin sides...)
Very Good point by sailing fool ....
the P323 has a 'wide body' and sheeting to the rail 'may' locate the clew of the jib/genoa to be 'outside' of the nominal "10° line" from the tack of the genoa away from the boats' Center line. You wont have 'inside genoa tracks' on a Shaw design P323 but you can use a 'barber hauler' ..... and such usage to precisely trim with a barber hauler is described in the "Are you at optimum trim?" article listed in my first post. ... but you will need a small enough area genoa so that its leech wont 'hang up' on the spreader when such is sheeted 'inside' the rail, or the genoa has to be recut (with sufficient 'leech hollow' so that the upper leech can easily pass IN FRONT of the spreader(s) when sheeted 'inside the rail'. -- Very common on most modern 'high end' racing boats.)