It depends, in part, on what "A Lake" is and how big it is and how big the waves get. On my rather small lake waves are not an issue with 28-30kt winds. In these conditions, my C22 can be sailed on a single reefed main, but it is a handful and not really fun to do. Because I have a masthead rig and adjustable cars, my boat sails better on just a partially rolled up head sail in these conditions.
33-35 or so is the limit of what I can sail in and still make a small amount of ground upwind - this with a furled scrap of headsail. A storm jib would have better shape and might do better, but wind power goes up much faster than speed, so how much more speed could be sailed in if needed is questionable.
From what I have seen of the ocean in a well developed gale [on edit - or force 6 - small craft warnings] - I would not want to be out there in my small craft. Waves are a big part of the equation. Hence, the size of your lake matters.
Other Hunter 260 owners are giving you good info about your boat. Since you asking - ideally you gain experience in small steps from 15kts upwards until you find out for yourself. I found out about thunderstorm microbursts by knocking a J22 over about 60-70 deg - twice

. Once we broached on only the class jib


. Not that I have learned - I have had water pour into the cockpit of my C22 several times

...
At least a C22 is self righting - I have never gotten past ~50 degrees on mine. But, I have watched a C22 right itself from 90, there is another thread on this forum on that story. Talk in depth with fellow H260 owners.
[on edit: my estimates of wind speeds on my lake might be downgraded 10% or so at sea level due to my sailing a "mile high"]
OC