THE CARGO IN BOTH OF A B777'S CARGO BINS WERE NOT SECURED ON PREFLT AND SO SHIFTED DURING FLT.

Narrative

ON WALK AROUND IN ZZZ FOR NEXT FLT; RAMP PERSON ASKED IF THERE WAS ANY PROBLEMS WITH WTS MOVING DURING OUR FLT. TOLD HIM NOT ONE THAT I WAS AWARE OF. APPARENTLY; ZZZ1 RAMP PERSONNEL HAD NOT SECURED EITHER CARGO HOLD; AND ALL BINS AND PALLETS WERE NOT LOCKED IN POSITION PROPERLY AND HAD SHIFTED AND MOVED DURING OUR LNDG OR TKOF. 6 OF THEM WEIGHED OVER 6;000 LBS; AND 1 WEIGHED OVER 10;000 LBS ACCORDING TO THE RAMP PERSONNEL. THEY HAD TO UNLOAD AND RELOAD ALL THE BINS CORRECTLY PRIOR TO OUR NEXT FLT. TALKING WITH THE CAPT DURING OUR NEXT LEG; HE COMMENTED THAT HE FELT THE ACFT WAS SLUGGISH COMING OFF THE GND ON ROTATION; AND MENTIONED THAT ATTITUDE DURING APCH SEEMED A LITTLE 'DIFFERENT' THAN NORMAL. THERE NEVER APPEARED TO BE PROBS CTLING THE ACFT; AND OTHER THAN BEING TOLD ON THE GND IN ZZZ; I DON'T THINK WE WOULD HAVE EVER KNOWN ABOUT THIS ISSUE. ONE OTHER THING; THE RAMP SUPVR IN ZZZ1 DID MENTION TO US THAT THEY WERE HAVING TROUBLE LOADING SOME BINS; BUT THAT WAS ALL THAT WAS SAID; AND DID NOT GIVE IT A SECOND THOUGHT UNTIL WE LANDED IN ZZZ AND WERE QUESTIONED BY THE RAMP PERSONNEL THERE. THEY SAID THAT THIS IS AN ONGOING PROB WITH ACFT COMING IN FROM ZZZ1.