.177 or .22?

if you not going be hunting rabbits etc but just pests and targets a 177 will be just fine,it will take down rabbits just fine,most uk use 177 cal and at only 12fpe mate,botth very accurate,not really anything tween them in accuracy,both have huge range of pellets available,177 generally gives more shots per fill than 22 cal,but will allso depend some what on how powerful both are too,my 177 has 22fpe at muzzle and uses heavier pellets and gives bout same shot count as both my 24 and 35 fpe 22 cals,all give approx 30 shots at full power before they fall off the regulaters,bassically you pays your money and make your choice eh.177 pellets cost bout same for 500 as 250 22 cal pellets,so bit cheaper to run,sounds to me that a 177 be fine for your purposes,and even if only a 12fpe rifle,i would have no,hope that helps mate