When load is mentioned

[deadon]

you guys always include the primer used. When testing for an accuracy load, should you try all primers available? I thought the primer just assured ignition. How big of roll does it play in your group size? Maybe just another dumb question

[Dave W]

I've tried tweaking good loads by substituting CCI M's for Feds and see no noticeable difference in group size.

Maybe a mediocre load could be helped with a primer substitution, I have never tried it though.

[Richard]

Rusty...........I never mention what primer I use?? (I do however use Winchester 209's all the time) But if you look a few weeks back, I did run some tests using four different primers and the difference was "0"
I think TGinPA is listing the primer simply so he and deadeye can compare apples to apples
Richard