Have 2 2x7x32's World Class TASCO scopes. Bought new in 1997. One on a 243 and one on a 270....after killing a boatload of deer and NEVER touching the scope after zeroing and 8 hunting seasons later I decided i wanted a bigger scope. Put the 2x7 on a 50 cal. lm.....no trouble with either! Zeroed and forgotten!