retired and starting into some local shooting contest within a three county area. the distances will be 100-600yds. Looking information on spotting scopes or rifle scopes that would allow seeing 30cal holes at those distances. Unfortunately money is an issue. I presently am using a used 8-32 burris black diamond target scope on the rifle. Not overly pleased with the clarity, but that what I have. What to do, a better scope or a spotting scope? Need real world thought, from experienced shooters. Thanks