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i am setting up for long range. what is the best way to do it.
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You are well on your way to shooting LR with the gear you mentioned.
Hold overs and BDC reticles have their place and several folks here use them with great results. I will chime in here by saying that you might rarely shoot over a level surface so BDCs will leave you wanting at the longer ranges because they are not calibrated for shots up and down inclines (to the best of my knowledge). My humble opinion is that if you want to do it right and be able to adjust your point of aim in precise 1/4 moa increments then you should add an angle cosine indicator
to your gear and get real close and snuggly with a good ballistics program. Then when you learn how
to opperate you scope in an efficient manner you can also start confirming the calculated drops from the program with real trigger time. This is what you should build your best field charts from. This is what I believe is the best way to get the longest usable range from your equipment as far as this topic is concerned. There is of course your shooting technique and the quality of your cartridges to consider.