I took a new build out today to zero. It is a Sionics 14.8 pinned and welded upper. I put a used eotech exps3 on it. I went to zero it at 36 yards and it was printing 4-5 inch groups more like patterns. I figured the optic might be loose. I checked it and tightened it slightly. It didn’t help, I had another rifle out with me so I took the H2 off that rifle put the eotech on and it grouped fine. So I tried the H2 on the new rifle and same 4 inch groups. It varied both in windage and elevation. I am going to contact Sionics tomorrow and I am sure they will help me. I have talked with them before never had an issue but have heard they’re top notch with customer service. I am just curious if anyone on this forum more knowledgeable than me could shed light on what would cause this. I thought maybe an over torqued barrel nut? Looking forward to any thoughts shared.
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