Advice Please

Hokay…

So I have obtained a 10kilo roll of Shakespeare NX-1032 1.7mm filament.

So far I have managed to get some decent prints with PLA (both 3mm and 1.7mm)

Can anybody suggest the correct temperatures for this new filament? I have tried at temps between 240 -260 degrees C but it won’t extrude smoothly.

I’ve got to the point where the whole thing is going in the skip!