The bucks stroke is a technique that is often done differently by every individual.  One of the first things a rudimental drummer should know is that if your hands are being used the same way as the others in your line at the exact moment in time with the same velocity, height,  and amount of squeeze --- or lack thereof --- you will be clean. 

Take a moment to re-read that last sentence.  Make sure you fully understand what that statement means for your style and playing. 

balanced look + equal velocity + equal usage of fingers and wrist + equal height

Returning to the bucks stroke the definition of a bucks stroke is an accented note that is played at whatever the noted dynamic is, and then held at whatever level the next note is.  (When playing single bucks, its generally a 9-12 accent stopped at 3 for the tap.) 

Note that the technique when playing the accent is the same as when playing the tap.  This is achieved by not changing anything in the hand for each stroke.  This is very important.  If you change the technique between playing the accent and tap, you are working yourself much harder than you need to be worked and often times you will find that your taps are so inconsistent that they disappear, or are just sporadically picking and choosing times to show up. 

different inconsistencies = a mutual dirt fest. 

Keep the back fingers close to the hand for this type of stroke.  Dont pinch off each note.  Keep your fingers in one position and articulate with the wrist.  When you do so, you are bypassing the injury of the carpals and forcing your flexors (forearm muscles) to do more work.  Logic should tell you that bigger muscles will help do more efficient work than the eight small carpal bones in the wrist.  Use the wrist, just not to the point of extreme pain. 

This technique helps to eliminate the possibility of contracting carpal tunnel, and it sure builds some bulky arms.  Delve in  There are many chops waiting to be unlocked by those who choose to help themselves.