Have you tried shooting it with the iron sights? Fast way to eliminate a variable.Arfmel-Hvymax,
You may have identified the culprit. I think I'll send it back to Leupold and see if they can find anything. I'll tell them about how erratic it shoots and see what they say.
Probably needs Russian spec bullets. 0.311 Russians did that on purpose so enemy ammo would be slightly smaller but still work but Russian ammo wouldn't work for enemiesI recall 4 MOA @ 100yds is the MIL-SPEC standard for 55gr 5.56x45.
Bear with me here...
Another thing I learned when loading for a 200gr lead/coated sub-sonic 300 Blackout is that barrel ID matters. The bullet tumbled at 7 yards. I called the bullet maker who was nice enough to take my call and suggest the barrel ID I have is over-sized. I miked the barrel, it is over-sized, and that bullet wouldn't get into the lands. Other plated and jacketed bullets work fine in that over-sized barrel.
Eliminate the barrel ID as a problem.
The vendor was contacted about the serious oversight. I was informed, "so sad, too bad. you bought it, you own it". I just voted with my feet and that vendor no longer gets my $.Re: 300 sub-sonic
There were many 300BO/AAC chambered barrels made with 1/10, 1/11, 1/12 twists. These may not stabilize the long for caliber bullets @ sub-sonic velocity. Some do-some don't.
I can only guess that a .311" barrel chambered for 300BO is a relatively serious oversight.