If I mention the problem I have it may also help you reduce this phenomenon ...
When I range find (Originally a Falcon T50) I hold my breath so as to steady the image and hopefully get a good distance reading..... The problem then is I am gasping for quite a few seconds after.... add this to nerves and my first 10 shots are generally poor.
I am working really hard on my breathing generally but whilst ranging even more so. I now have a sightron which snaps a lot better and this has helped tremendously.
Hope this helps and good luck.
EV2 MkIV Red. Sightron SIII 10-50x60 FT.
AJP Rail. Sportsmatch ATP66.