[mtscott]

Both of these boxes are Magnum primers.

The first box that my load data calls for says this on it:

Federal Premium
NO. GM215M
Large Magnum
Rifle Match Primers
(Red and Gold Box)

The box my dad bought this week says this on it:

Federal
NO: 215
Large Magnum
Rifle Primers
(Blue and Grey Box)

So are they both the same primer but one is just premium?

I am loading ammo for the 300 WBY Magnum.

Thanks...