I have a .223 heavy barrel handi bought used. Added Tasco 6-24x42 scope, not the best I know but right price at the time, and a bipod. Off the sandbags and a bench I can't get a 100 yd group that's inside 5 or 6 inches with the winchester White Box varmints, 45gr HP, or Remington ammo, 55gr FMJ. I don't know if it's the scope or what. Everything seems to be tight, and I tried the scope on a .22LR and it seemed to hold zero pretty well and had decent groups for 100 yds. I am also going to try Black hills ammo, 40gr NBT, to see if the ammo is the problem. I'm about ready to trade on a bolt gun or sell it out right if this doesn't shape up. Any suggestions to improve accuracy, rule out the scope malfunctions.
Thanks in advance and sorry for the long post.