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200y 5 shot group

thomasair

Member
Manufacturer
Nov 6, 2016
2,703
4,891
Colorado, United States
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Curiosity got the best of me and I decided to put a target out at 200y and see how my Thomas Slug gun would do.

I have never shot at this distance or anything over 100y with this gun til today. This group took me exactly 7 shots from setup to shoot. I turned the elevation all the way to the stop and held the crosshairs in the middle of the target for the first shot. It hit dirt in front of the target. I then put the bottom dot on the reticle in the middle of the paper and just caught the bottom of the target. Next, I put the bottom of the reticle bar on the top of the target and fired the remaining 5 shots. It’s 1.045 MOA.... plus a fairly nice 3 shot cluster at .2 MOA.

Mike



 
You are right that you can't see what the groups are like until you walk out there. First test at 200m with my slug gun a couple weeks ago. Not 1 moa but hope to get there. Shot a 6 shot sight in target. Walked out to get some measurements. And then a 10 shot target with additional sight adjustment. Distance from bullseye, mean = 0.91 moa, and SD = 0.34 moa. Goal is to get a mean of 0.5 moa.

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A 4 mph wind variation could account for the entire horizontal dispersion. I was using my Labradar and those 10 shots had a 7fps ES with weight sorted slugs. That fps spread alone can account for 1.7" of the 2.5" total vertical dispersion. I need a perfectly calm day and keep the velocity spread down. I probably got lucky with the 7fps spread as it's usually a little more.