We've been sailing our 380 for the past 5 years. We sail her at 40 degrees to the wind easily (no motoring at that). Now that we are live aboard cruising & loaded down, the performance has suffered accordingly, but she still does well enough for us.
As others have said we keep the weight as far to the rear as possible with the water
maker in the rear lazarette, gen set extra fuel
etc. Golf clubs are on the spare rear berth & all the tools & spares below the rear berths etc. Still the lowest step on the sugar scoop is still above water when boat is at rest.
We sail the coast of Queensland
from home up north near Cairns to the Gold Coast down south. Currently in the Whitsundays. Our best SOG has been 12 knots (broad reach) but usually best is more around the 10's. I love the 6 to 9 knot
Sailing upwind in light to moderate I pull the traveller to windward a couple of feet from centre & ease the main sheet a tad. Reaching I tend to sheet the main on more than most & use the traveller to ease & get the correct angle.
Broad reaching, sailing downwind etc I rig a pulley from the middle mooring
cleat on the gunnel & run an extra genoa
sheet through this to get the sheeting angle out wider. The normal track for the genoa
sheet is just way too narrow/inboard to get any decent sheeting angle. It also allows us to run wing on wing with the main easier & more efficiently.
We try to put the first reef in at about 17 to 18 knots depending on angle of sail & second reef anything over 25. The most wind we've sailed in has been around 35, but then we try to avoid bad conditions as much as possible. We're retired & we have time. We cruise
Here's a short video we took cruising to Whitsundays in 2014.
Hope this helps.