B767 CREW HAD A STICK SHAKER WHEN THE CAPT DIRECTED THE FO TO CLB THE ACFT INTO COFFIN CORNER.

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CRUISE FL370; RECEIVED WX RPT; SVR WX WARNING; LEVEL 4 AND LEVEL 6 TSTMS. CAPT TOLD ME TO CLB TO FL390; THEN TO FL410. HE HAD CHKED BUFFET SPDS FOR THIS WT AND ALT. CAPT THEN TOLD ATC WE WANTED TO BLOCK ALTS FL410 TO FL430. I (PF) CHKED PERFORMANCE CHARTS AND TOLD CAPT WE WERE ABOUT 30000 LBS TOO HVY FOR FL430. HE TOLD ME I WAS WRONG AND THAT IN HIS 'EXPERIENCE' HE WOULD USE A CHART OTHER THAN THE MAX ALT/OPERATING WT CHART. HE SOLELY USED BUFFET SPD CHART AND INTERPOLATED NUMBERS FOR FL430 AND SPD OF 195 KTS. HE THEN ORDERED ME TO CLB FL430. I TOLD HIM WE WERE TOO HVY AND EXPLAINED MY USE OF CHARTS. HE ORDERED ME TO FL430 IN AN ATTEMPT TO TOP TSTMS (FL500) AND HE PUSHED FLCH TO PUT ACFT IN CLB. FMC STATED MAX ALT FL414. AIRPLANE CLBED TO FL416 AND LEVELED OFF ON AUTOPLT. IN CLB I TOLD CAPT HE WAS PUTTING US IN JEOPARDY OF STALL AND IN A VERY DANGEROUS SIT. HE SAID WE ARE FINE. AS WE APCHED THE TSTM AT FL410 IT WAS CLR WE WOULD NOT BE ABLE TO TOP IT AND MIGHT EVEN FLY THROUGH IT. I TURNED THE AIRPLANE TO PARALLEL THE WX SYS. THE CAPT SAID WE COULD TOP IT; BUT WE COULD NOT; WE HAD MAX CONTINUOUS PWR AND COULD NOT CLB ANYMORE; AIRSPD SLOWED TO APPROX 205 KTS. IN STRAIGHT AND LEVEL FLT AT FL416 GROSS WT OF 268;200 LBS; STICK SHAKER ACTIVATED FOR ABOUT 1.5 SECONDS. I IMMEDIATELY TURNED OFF AUTOPLT AND STARTED A FAIRLY RAPID DSCNT TO FL410 TO GAIN AIRSPD. THE CAPT FIRST TOLD ME TO CLB TO FL425; THEN TO LEVEL AT FL415. I CONTINUED TO FL410 WHERE I KNEW PERFORMANCE WAS ACCEPTABLE. AT FL410 AIRSPD GAIN TO 230 KTS. CONTINUED S UNTIL WAS ABLE TO CIRCUMNAV STORM. CAPT REFUSED TO ACCEPT FACT THAT HE PUT US IN A DANGEROUS SIT. HE STATES THE CHARTS MUST BE WRONG. CAPT'S IGNORANCE AND ARROGANCE IN ORDERING ME TO CLB TO AN OVERWT ALT PUT US IN A DANGEROUS SIT.