is this still safe to use?

If I loaded it, I would proberly shoot. I've seated a bullet too far before.

If I ever had a question about the round, I would pull the bullet and re-load it again.

 

Simply put it in your bullet puller, and smack it lightly until it is a little farther out, and then measure again. reseat the bullet to the proper depth. Simple as that. Don't shoot it, as it will not be engaging the rifling, this can cause bullet yaw and can damage the crown of the barrel on exit.
If this is your first loads ever that you have loaded, look closely at your primers after the first few shots. Your primers will tell you everything as far as pressures go. IF they are super flat and you can see the firing pin hole outlined on the primer, your load is too hot. If the primers look as though they are rounded and no flattening occurs, add powder to your load. When i load test rounds for a new rifle, i load 12 rounds and they are in lots of three, all different parameters. I do this for primer type, powdered type, and bullet type. Think of it as tuning a fine instrument. But that is just me, i try and get every thing out of my weapons. I spend hours at the loading bench.

 

I think the rule of thumb is if you are questioning it DO NOT take a chance. You lost less than .10 with brass, primer, powder, & bullet. Mark it defective and put it on a shelf or take it to a firing range and put it in their misfired/dud ammo disposal bins.