Hello all, newb here. Grew up shooting Daisy 10-pumpers and graduated to rimfires and later centerfires. I now have a need for an "adult" air rifle. Due to urbanization and the spread of a nearby highway I'm needing something to pluck pigeons and starlings off the barns and silos. I was reading the $200 rifle thread and it got sent me to a Hatsan at midway. I'm liking the reviews of it on the website but not sure what caliber to choose. I am ready to take the plunge on the 1000x but not sure if a .22 or the .177 would be better. The ranges for this shooting might get past 30 yards but not much past that. Any thoughts and suggestions?