A LNDG SF260 SMA LANDS LONG AND HOT ON A WET RWY WITH A TAILWIND. PLT IS SURPRISED WHEN HE SUFFERED A RWY EXCURSION AT THE OTHER END.

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ON SEP/XA/98; I WAS ON A TRAINING MISSION FOR A NONPROFIT ORGANIZATION. UPON RETURN OF THE FLT; I NOTICED SOME TSTM ACTIVITY IN THE ARPT VICINITY. I ENTERED THE LNDG PATTERN ON A 45 DEG DOWNWIND (L) ENTRY TO LAND ON RWY 24. AFTER I RPTED TO THE TWR THAT I WAS ESTABLISHED DOWNWIND; I ASKED FOR A WIND CHK. THE CURRENT WIND WAS 180 DEGS AT 7 KTS AND THEN THE CTLR REPLIED THE WIND WAS VARIABLE BTWN 180 DEGS AND 120 DEGS AND THAT SHE WOULD FURTHER ADVISE. AS I APCHED THE 180 DEG POS; I BEGAN TO ENTER MODERATE TO HVY RAIN. AT THIS POINT; I MADE A CONSCIOUS DECISION TO GET THIS PLANE ON THE DECK. AS I CAME OFF THE ABEAM POS; I WAS SLIGHTLY HIGH AND MOVING FROM ON-SPD TO FAST. I KEPT A TIGHT APCH TO FINAL (SHOULD HAVE EXTENDED DOWNWIND FURTHER) AND THEN ROLLED OUT ON FINAL; HIGH AND FAST. I HAD THE PWR AT IDLE AND SELECTED FULL FLAPS. I BEGAN TO SLIP THE ACFT AND REACHED THE GS; BUT I WAS APPROX 5-10 KTS FASTER THAN NORMAL APCH SPD. AS I CROSSED THE RWY THRESHOLD; WITH THE PWR AT IDLE; I BEGAN TO ENTER GND EFFECT. DURING THIS TIME; THE WIND SWITCHED TO A 10-15 KT TAILWIND. I BEGAN TO FLOAT DOWN THE RWY AND TOUCHED DOWN APPROX AT MIDFIELD. USABLE RWY LENGTH WAS 2822 FT. INSTEAD OF INITIATING A GAR; I ATTEMPTED TO LAND AND THEN STOP THE ACFT. I WAS NOT AWARE THAT THE RAIN; WHICH I ENCOUNTERED ONLY AT THE 180 DEG; HAD LEFT A FINE MIST ON THE RWY. AS I BEGAN TO BRAKE; THE ACFT BEGAN TO FISHTAIL BACK AND FORTH. I LET OFF THE BRAKES FOR A BRIEF MOMENT AND THEN REAPPLIED FIRMLY TO SLOW DOWN. THE ACFT BEGAN TO DECELERATE SLOWLY AND STARTED SKIDDING. AS WE NEARED THE END OF THE RWY; I TRIED TO MAKE A R TURNOFF; BUT THE PLANE CONTINUED TO SKID. ONCE IT LOOKED LIKE WE WERE ABOUT TO LEAVE THE CTLED SURFACE; I PLACED MY ARM ACROSS MY PAX AND BEGAN REACHING FOR THE MIXTURE HANDLE; AT WHICH POINT WE IMPACTED A CHAIN LINK FENCE AT A RELATIVELY LOW SPD. BOTH THE PAX AND MYSELF EXITED THE ACFT ON OUR OWN ACCORD. THERE WERE NO INJURIES AND THERE WAS MINIMAL DAMAGE TO THE ACFT. LOOKING BACK ON THE SEQUENCE OF EVENTS LEADING UP TO THE INCIDENT; THERE ARE SEVERAL GREAT LESSONS LEARNED: 1) I SHOULD HAVE EXTENDED DOWNWIND INSTEAD OF MAKING SUCH A TIGHT PATTERN. 2) ONCE I FLOATED PAST THE 1/3 MARKER; I SHOULD HAVE EXECUTED A GAR; AND THEN RE-ENTERED FOR THE OPPOSITE RWY. 3) ONCE COMMITTED TO THE LNDG (STOPPING THE ACFT) AS SOON AS I REALIZED THAT WE WOULD BE LEAVING THE CTLED SURFACE; I SHOULD HAVE IMMEDIATELY SECURED THE PROP. 4) NEVER TAKE FOR GRANTED YOUR EXPERIENCE LEVEL FROM MIL TRAINING IN HIGH PERFORMANCE ACFT. UNDERSTAND AND RESPECT THE EQUIP YOU OPERATE. 5) CONSTANTLY ASSESS WX AND REPERCUSSIONS THAT COULD IMPOSE ON YOUR FLT. 6) REVIEW SHORT FIELD OPS -- ESPECIALLY IF LNDG WITH A TAILWIND; AND NEVER ALLOW YOURSELF TO FLY OUTSIDE OF THE AVIATION BOX YOU HAVE ESTABLISHED FOR YOURSELF. SET PERSONAL REQUIREMENTS AND RULES (REFER TO #2) AND DO NOT DEVIATE.