I wouldn't bother.
Those obsessed by these things will probably say yes but you need to know things like die number and be prepared for quite a few damaged pellets. The main 'cult purchase' of Premiers were in .20 when they were the best pellet available especially for FAC .20. That is ignoring the high price and damaged pellets as a result of the idiotic packaging. Since those days JSB have intorduced excellent .20 pellets and the only shooters I know sticking to the boxed Premiers are those who bought loads of them way back when.
As .177 is easier to obtain from many reputable makers who use proper packaging I'd try the boxed Premiers only as a last resort.