Wind was from the SW 6 mph with lots of calm in between breezes. The holes are ragged as I did not have any of my MDF backers. On group number three the gun came off the reg for the last three shots. Did a partial fill to 3K psi and shot groups 4-6. Group number four is easily 1/4". Bipod front, rear bag, JSB Exact Jumbo 18s at 875 fps. All groups single loaded, except group 6, which was shot from the magazine.