Between the rudder and elevator which servo has the most load on it?

You haven't provided enough information AV8or. The load on a control surface depends on several factors. How much deflection, how big is the surface, are there any aerodynamic balances,servo tabs, etc.

It would also be useful to know what plane we are talking about.
Mike

Sorry - a 25% Edge 540. Both the elevator and rudder have the scale counter balance tips with weight.
I do not know what servo tabs are.

in this case the surface with the largest area has the greatest load.

The rudder, without any doubt... Use something like a Hitec 5945. JR8411, JR4721 or another servo with at least 100in. ozs.

http://www.multiplexrc.com/calcservo.htm
give that a try

Thanks to all, and thanks for the servo analysis calculator phillybaby. I am still in a quandary in my servo selection for this 25% Edge. The best servo I have right now is an Airtronics 94158 servo which has 145 in/oz of torque and .10 sec per 60 degrees rotation according to Airtronics. The rest are standard servos. My thoughts then are to put this on the rudder. For the elevator I can't decide to go twin servos like a HS-225MG or a stronger single like a HS 545/605/or 625. I will play around with this servo analysis calculator and see what it offers.

when i use that servo calc i go a little OTT on speed so i WONT! get any problems, with which servo you use for which... you can land a plane if you lose rudder, you can land a plane if you lose one side of the elevator, you cant land if you loose elevator compleatly, ( ok, yes i know, its been done, i've done it too )
If your gonna have sommit that big i would use two servos for the elevator, and then you can get a bit of taileron mixing going too for more fun, better for prop hanging i beleive...

I always put my best servos on elev and air, then throttle and rudder can have the less powerful or crashed before ones..