Post photos of your GK1 target groups. Please let us know which caliber your GK1 is, configuration, version number, the distance you shot from, number of shots, the optic(s), position shot from, rest (if one was used), ammo maker, style (pellet or slug), grain weight. If you know the velocity please share that too. An average velocity will do, no need to post chronograph shot string data. There are enough threads with chronograph data. What they are missing are pictures of groups on the targets shot. So show us what you’ve got.
