What primers are you using

[berrnard]

for hunting loads i use mags. so cci 250s or 450s
cause when i hunt, it can be 50F to 0F.

 

[Boomstick]

I was bored this weekend, so grabbed my 223 load data, and loaded up 10 each with, Rem 7 1/2, BR4, CCI 400, Fed 205 and Fed GM205MAR. All shot well, under 1" at 100yds, but in my instance both Fed (specifically the regular 205) were most accurate/consistent. We're talking .1MOA ish here, but was cool to see how each of these grouped.