If a Win209 fits yours, i highly recommend them. Nearly all of my best groups are with the standard Win209. Personally i don't feel a mag primer is needed in a good plug. Even Savage has used the Win209 with smokeless for testing before shipment.

If a RemSTS primer fits well, IMO they are worth some range work. They are close to a Win209 in actual "strength" but are supposed to have a hotter flame. Im not completely sold on the primer moving the sabot theory but i have tried WinT7s and they can work great with BH209 under the right conditions and proper fit.

Cheddites are another primer worth trying if they fit but they are a Euro primer and might not fit some USA guns. They are also close to a Win209 in strength.