6.5 CARCANO ,
I have a red dot , and they will work well if properly sighted in like any scope . They are particularly good for quick target aquisition , running shots are similar to scope . You still have to center the dot like crosshairs or you' ll miss a lot . BSA bites , save your money for a better one like that Simmons you mentioned . Cheap ones are only good for bb guns or getting used to red dots before buying a good one .