Hi, welcome to AGN. I myself think that 50yds is on the long side for an ethical shot with a springer.,even a Weirauch. I'd keep it within 35yds if I could. Maye that Hatsan 30 or 35 cal springer could do it but like what others have stated,they can be hard to shoot consistantly accurate and the more powerful they are the harder it is to shoot accurately. A pcp can shoot that far,and accuratly enuff. Even a low dollar one. You'll have to include purchasing a (high compression) air pump or a (high pressure) air compressor. Also you should try an assortment of pellets to find which is the most accurate. ( H&N and JSB pellets are your best & quickest bets ). Once your in the game,your gonna have a good time. I have a Hatsan Flashpup,wood stock 22cal scoped with Hawke 2-7X32, that shines at 50yds and I wouldn't hesitate to take a 50yd head shot. It'll shoot further but the accuracy falls off after 50yds. good luck,