Those groups are terrible! Have you tried checking the baffles and/or tried loading single-shot without the magazine? This might help determine if it's the magazine or barrel problem.
Tom Gaylord (aka B.B. Pelletier), just put out his Part 5 review of the SAM (see Airgun Academy blog "Benjamin Marauder Semi-Auto (SAM) PCP Air Rifle: Part 5"). He was also having accuracy problems, and discusses how to checked the baffles for clipping, and loading single-shot (which is not straight forward). He determined that it was likely a magazine issue. I would provide a link, but not sure if that's allowed.
I don't have a SAM yet, but hope this helps.
Tom Gaylord (aka B.B. Pelletier), just put out his Part 5 review of the SAM (see Airgun Academy blog "Benjamin Marauder Semi-Auto (SAM) PCP Air Rifle: Part 5"). He was also having accuracy problems, and discusses how to checked the baffles for clipping, and loading single-shot (which is not straight forward). He determined that it was likely a magazine issue. I would provide a link, but not sure if that's allowed.
I don't have a SAM yet, but hope this helps.
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