AN LR-31A FO RPTED IMPROPERLY SETTING THE ALTIMETER DURING DEP FROM ICT; CAUSING AN ALT OVERSHOOT.

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MY CAPT AND I ARRIVED IN ICT AT APPROX XA30 TO DROP OFF 1 PAX AND OBTAIN FUEL. I WAS THE PNF. APCHING ICT; WE DSNDED; APCHED; AND LANDED VFR. WHILE ON APCH; I OBTAINED THE LCL ATIS. THE LCL ALTIMETER SETTING WAS APPROX 30.27. THAT WAS SET INTO ALL 3 ALTIMETERS. AT THAT TIME OUR METERS WERE ACTUALLY SET TO 29.27. BEING VISUAL; THERE WERE NO ALT RESTRS. WE HAD BEEN CLRED FOR A VISUAL APCH TO RWY 18. UPON TAXIING OUT; I WAS THE PF. THE PNF OBTAINED THE NEW ATIS. THE NEW ALTIMETER WAS 30.26. THE SECOND MISTAKE WAS THAT I ASSUMED THE SETTING WAS CORRECT; AND DID NOT XREF THE FIELD ELEVATION TO THE ACTUAL ELEVATION ON THE ALTIMETERS. WE DEPARTED ICT FOR LIT. ON DEP; WE WERE GIVEN A CLB TO 15000 FT MSL. AT 1200 FT MSL; WE WERE HANDED OFF TO CTR. DEP'S LAST COMMENT WAS 'DON'T CLB THROUGH 15000 FT MSL.' I REPLIED SAYING 'ROGER; WE ARE ABOUT TO LEVEL OFF AT 15000 FT.' WE CHKED ON WITH THE NEXT CTLR AND HE GAVE US A CLB TO FL230. I AGAIN REPLIED SAYING 'CLBING OUT OF 15000 FT FOR FL180. OUT OF APPROX 17500 FT; THAT CTLR ASKED US TO VERIFY OUR ALT. A MOMENT PRIOR WE HAD JUST COMPLETED A FL180 CHK. BY THE TIME I RESPONDED; WE WERE OUT OF FL183. AT THAT TIME THE CTLR CONFIRMED OUR ALT AS WHAT WE WERE RPTING. IT TOOK US A FEW MINS TO RECREATE THE EVENTS THAT LED TO THE PROB. FORTUNATELY; TERRAIN AND OTHER ACFT WERE NEVER A CLOSE FACTOR. ALTIMETER SETTINGS AND XCHKS SHOULD NEVER BE TAKEN LIGHTLY. THEY SHOULD BE CHKED NUMEROUS TIMES FOR AVOIDANCE OF TERRAIN AND SAFE DISTANCES FROM OTHER ACFT.