I'm getting started as a long range hunter/shooter. I plan to target shoot at distances from 300 yards up to potentially 600 yards. What power and quality of spotting scope is necessary to see bullet holes at these distances? I am shooting both .25 caliber and .30 caliber rifles. I have a Bausch & Lomb 15-40x60 Elite scope. Will this suffice or do I need something of a higher quality and/or larger objective?