DA20 PLT HAS HARD LNDG AT BOI WITH PROP STRIKE AND GAR.

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ONCE THE TFC WAS NOT A FACTOR; I MADE 2 360 DEG TURNS AND THEN RPTED IN THAT I WAS READY FOR LNDG. TWR CTLR ADVISED ME I WAS #3 TO LAND AND TO ENTER AND REMAIN ON DOWNWIND UNTIL HE CALLED MY BASE. I ENTERED THE DOWNWIND SETTING UP FOR AN ANTICIPATED EXTENDED DOWNWIND. THIS IS WHAT I WOULD CLASSIFY AS THE BEGINNING OF THE CHAIN OF EVENTS LEADING UP TO THE INCIDENT IN QUESTION. A SHORT DISTANCE PAST THE APCH END OF THE RWY; TWR CALLED OUT LNDG TFC AND CLRED ME TO LAND; IE; THERE WOULD BE NO LONG DOWNWIND. WHAT THEN TRANSPIRED WAS CLOSE TO BUT NOT QUITE WHAT I WOULD CALL A 'SHORT' APCH. BUT IT WAS CLOSER IN THAN WHAT MY DEFINITION OF NORMAL WOULD BE. IT WAS NOT A SITUATION I HAVEN'T BEEN IN BEFORE. FOR THE APCH I ULTIMATELY WAS HIGH AND FAST. FLAPS WERE EXTENDED AT THE NORMAL 100 KIAS FOLLOWED BY LOWERING ALL THE WAY WHEN AT OR SLIGHTLY SLOWER THAN 80 KIAS. AT THIS POINT I WAS STILL HIGH AND FAST THOUGH ON THE APCH. MY NORMAL PRACTICE OF SLIPPING WAS NOT AS EFFECTIVE IN THIS ACFT AS IN THE C172 I NORMALLY FLY. IN SHORT; IT WAS NOT A STABILIZED APCH. THE NOSEWHEEL HIT PRETTY HARD. TO THE BEST OF MY RECOLLECTION IT WAS SHORTLY BEFORE OR AFTER THE NOSEWHEEL HIT A SECOND TIME THAT FULL PWR WAS APPLIED TO BEGIN A GAR. THE NOSEWHEEL DID STRIKE A THIRD TIME. I SUSPECT IT WAS AFTER THE THIRD CONTACT THAT I BEGAN TO RETRACT THE FLAPS. I HAVE TO ADMIT THAT FROM THE SECOND BUMP ON DETAILS OF EVENTS AND THEIR EXACT SEQUENCE ARE SKETCHY. AT THE TIME I HAD NO THOUGHT NOR WAS THERE ANY COMPELLING REASON TO BELIEVE THAT THE PROP STRUCK THE RWY. I WAS CONCERNED ABOUT POSSIBLE DAMAGE TO THE NOSE GEAR. THERE WAS NO EXTREME VIBRATION AND THE ENG WAS RUNNING FINE. I DID SENSE THAT SOMETHING WAS NOT QUITE RIGHT THOUGH. I CLBED TO PATTERN ALT AND EXECUTED WHAT I WOULD HAVE TO SAY WAS; UNDER THE CONDITIONS; A NORMAL DOWNWIND; APCH AND LNDG FOLLOWED BY TAXIING A SHORT DISTANCE TO THE NORMAL TIE-DOWN AREA. UPON GETTING OUT IS WHEN I NOTICED THE DAMAGED PROP. IN RETROSPECT; MY DECISION TO PROCEED WITH THE LNDG; BASED ON MY EXPERIENCE IN A C172; WAS BAD. I HAVE NO DOUBT THAT GIVEN THE SAME SCENARIO THE OUTCOME WOULD HAVE BEEN A NON-EVENTFUL LNDG IF I HAD BEEN IN A C172. MY LACK OF EXPERIENCE IN THE DA20 SHOULD HAVE BEEN TAKEN INTO CONSIDERATION WHEN MAKING THE DECISION TO CONTINUE WITH THE APCH/LNDG. IN HINDSIGHT; A GAR WOULD HAVE OBVIOUSLY BEEN THE BETTER DECISION.