I shoot indoors most of the time, but today I was shooting from inside the house and out the back door. It's about 14 yards from where I'm shooting to the door and the rest of the way out the door to my trap setup covers about 6 yards for a total of 20. The wind was blowing very lightly, with an occasional strong gust. I have a wind flag set up on my trap so I can see when it's blowing hard.

Anyway, I was cloverleafing indoors (less than 1/4") at 14 yards all morning and decided to push it to 20. My groups suddenly opened up to about 1/2". I figured no big deal, maybe the chps aren't holding up at that distance. I sighted in, shot a few dozen more, then took a break. When I got back to shooting again, my groups suddenly tightened back to less than 1/4". I figured maybe I was just a little fatigued earlier. I re-zeroed and shot about 20 rounds when suddenly it opened up again to about 1/2". Some holes would touch, but for the most part they were all over the place within 1/2". I'm thinking the good string I had may have been when the wind was dead.

Anyone here shoot a lot in the wind and can enlighten me a little? Can even the slightest wind, or even change in pressure from leaving the back door affect a pellet that much? I never thought about it since it only travels about 6 yards out the door, but I may be wrong. I'm shooting 7.9 grain pellets (don't have any heavies handy right now) so maybe the weight of the pellet is another reason? What do you guys think?

i have also had that problem, but at longer range, were i live i get crosswinds and like from 35 yards and out its really hard to adjust for the wind, because i'll be shooting from behind the house the pellet will come out from behind the house, get blasted with the crosswinds, go behind my shed then when it comes out from behind the shed it gets blasted with wind again untill it gets behind my other shed,
i also shoot cphp and havent really noticed a big difference at 20 yards with the wind

I've never had them open up that drastically over just 6 yards difference unless it's out to 50 yards. My 35 yard groups are much better than my 50 yard groups. I've seen the wind move a pellet a bit over an inch at 40 yards with a brisk breeze.

I have seen that happen with barrels getting warm too, especially sighting in a .22 in colder weather.

I know my old crosman 2100 classic (pump) would start to behave differently when I shot repeatedly. I would shoot well - say 10 yards with 20 shots, then go eat lunch for an hour, then come back and have the group move over.

I worked in waterjet CNC machining for a number of years. you would be amazed how much metal can shift due to just a single degree of temperature difference (depending on type obviously).

I just don't think a SLIGHT breeze can affect travel much at a 6 yard difference, but then again, maybe that rifle + pellet combination just isn't meant to go beyond that.

Try .22 caliber. They buck the wind much better. .22 cal. Kodiaks
and Eun Jins seem to be the best wind pellets. Keeping the
velocity up above 900 fps also helps. I've never found anything
better for the wind than a .22 Eun Jin going 1050 fps.