rifle; .223 CZ 527 Varmint.
Cold ( California) wind gusting to 20 MPH. Rifle had not been cleaned in last 3 outings.
Scope 24 X power, about 90% clarity at best.
Cases, ppu.
primers, 7 1/2 BR.,
Powder Acc 2015---25 grs.

53 gr. Sierra BR, 0al= 2.250" , mild, clean, 5 shot .300" group at 50 yards.4 shot 1.000" group at 200 yards.

50 gr. psp. Rem., Oal= 2.230", mild some soot., 4 shot 1/2" group at 50yds.6 shot 1.000" group at 200 yards.

34 gr HP.,Varmint Nite Mare., Oal= 2.135", Mild, some soot. 6 shot 1/2" group at 50 yards. 5 shot 2.000" group at 200 yards.

52 gr. Nosler Comp., Oal= 2.250" 5 shot 1/2" group at 50 yards.

50 gr. Speer TNT., Oal=2.277", 10 shot 3/4" group at 50 yards. GREAT at 200 yards.

40 gr. Win comp., Oal= 2.140", 3 shot 3/8" group at 50 yards.

I'm convinced I was the weakest link in the accuracy chain. Many could have done better. roger