I bought this rifle to fire 500 to 700 yards max. I need a scope for it. I really do not know what to buy. Money is tight I used a truglo scope 6x24x44 infinity. I used this scope to try out the rifle but am very disappoint with this scope. It has no mil dots . The rifle shoots as expected. but when i went pass 100 yards the bullets went awol on me the groups where not as tight. I went from 25, 50, and final 100yards to zero the rifle. The nut on the the scope got loose and I had to retighteen them. Should I use blue lock tight on the nut. I can spend around 300 t0 400 on the scope. I would prefer to have mil dots on this scope. This is my first bolt action rifle. for semi long range. I live in New jersey and I go to range 14 in Fort Dix army base. If some can help me set up this rifle it would be nice. I need help in setting and mounting the scope.
Ps. please help a novice