.280 AI Die Set Question...

[surhuntsalot]

I bought a set of RCBS dies from a fellow who said they were for a 280 AI. The set that I recieved in the mail are labled as follows....

RCBS .280 REM IMP 40 F L DIE SET.
P/N 56266
Group G

My Question is, are these the dies for the .280 Ackley, or are they for another improved version ?

Thanks