Boxed ammo comparison / test procedure?

[Ahap]

I have collected 12 different .223 / 5.56 factory loads ranging from 60 to 77 gr for testing to see what my barrel likes best. My plan is to shoot 1 fouler, then a 5 shot group (over a chrono), clean with a brush and several patches, repeat. Does that sound like a good procedure to get fairly accurate results? Any other suggestions?
Thanks

 

[55fairlane]

A) lsarn to load your own. You can figure out your accuracy load in 10 shots.
B) what's the clock tell ya? Last I checked the clock didn't give me Group size.
C)if your not gonna load your own, you need groups at 200/300 or 600 yards
D) fire 2 or 3 shots to eliminate cold bore, them just shoot. There copper jacketed. Unless your copper fouling the bore (way unlikely) just shoot for groups.