Just an idea, were your earlier dives shorter... meaning were you getting your tanks below 1000 psi.
I mention it because personally I thought I was weighted right for my check out dives and a few thereafter. Once I dove more and got comfortable hitting the beach closer to 500 psi my neutrally buoyant amount of lead became an underweighted situation. I know this would probably only account for 2-3 lbs at the most, but it could be a contributer.
One other idea, if you're in better shape, maybe your lung capacity is higher, therefore more buoyancy.
:hithead: I have no idea.
I mention it because personally I thought I was weighted right for my check out dives and a few thereafter. Once I dove more and got comfortable hitting the beach closer to 500 psi my neutrally buoyant amount of lead became an underweighted situation. I know this would probably only account for 2-3 lbs at the most, but it could be a contributer.
One other idea, if you're in better shape, maybe your lung capacity is higher, therefore more buoyancy.
:hithead: I have no idea.