That usually matters IME. I think they always used to have the head size printed on the tins, and once I found the head size that shot the best, shooting more pellets with that same head size has always been a fruitful endeavor to me.
Safe and Happy Shooting!
Ed Krzynowek, The Airgun Tune-Meister
"We can rebuild the squirrel. Make him stronger, faster...We have the technology"---Skyler M.