With single drum hits, you dont want them to be "tracked"; ("screwed around with pitch") hehe.
Typically when you sample a pitched instrument, you'd sample in minor third intervals. This is the semi agreed upon standard so shit does not get too stretchy when playing high or too flabby when playing low. Bust out any AKAI CD and if you use CDXtract to audition any given piano/guitar/bass/Roseanne Queef, it will sound like an ascending diminished line.
It's not a fault of Reason, and it's pretty typical of the way samplers behave. Reason does not know WHERE you want the root to be, so you cannot just blindly strap a samp to a key, or you'll get the "lowest note on an organ" scenario.
Battery is dope if you are doing just drum hits because you don't have to worry about root/pitch off the bat.
IMO, Kontakt 2 is the schnizzle when it comes to soft samplers... no offense to MOTU Mach5 or Halion users. =)
Get'cha pull.