Lousy groups

[mr.e moose]

Check the screw on your mount. I shot 4th at a service rifle shoot only to discover after that the screw had loosened.

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[bob4wd]

Check the screw on your mount. I shot 4th at a service rifle shoot only to discover after that the screw had loosened.

Scope mount and action screws are all tight. All shots from a bench on sand bags. Haven’t tried the open sights yet, that’ll be next. By the way, results are pretty much the same with light loads (lead), fairly heavy loads (lead), factory ammo and reloaded ball. Wrapping tape around the muzzle-end seemed to help, but then reverted back to the usual shotgun pattern!

[Gil Boyd]

Bob,
Sorry to be a pain. Those rounds on the target you showed us are not that bad. Its a shame you haven't got a round by round numbered sequence which could help the diagnosis.
It is a combination of very slight errors, sandbags will help, but I can't see how you, for example squeeeze or pull your trigger snatch your bolt etc!
Just try it one more time with someone spotting for you and number the rounds for me, we'll get there mate.