That Trijicon Credo 4–16 should get the job done for you if your shooting out to 700yds. I would put it on your most accurate rifle and put some rounds down range. put some flags down range, keep an eye on your wind. Pay attention to your mirage.
move back to 500 where you have some confidence. Practice basic fundamentals. Trigger control, breathe, relax, squeeze, follow through, etc. Call your shots. Get good at 500. Then move out to 700. That should get you better results than just starting a 700 and guessing why your not hitting the target. Jmo. I would try that first before spending any money.
