If you are going to look at taking shots past the 300m mark then you also have to factor into your costings a good quality range finder. Look at the ballistic data and see what happens if your range estimate of 400m is 50/100m out. this error is very real when you are looking across broken ground and/or gullies. In my personal experience the range finder is a real eye opener as well as a major advantage past say 300m. I have tried both the old fashioned hold over and ballistic turrets, holdover is just not as precise, there is always the temptation to "give it a little more". Having said that if you go the ballistic turret route then you need the best quality you can possible afford in order to get repeatable adjustment. I recently switched to a Swarovski 3.5-18 with the ballistic turrets it gave me heart palpitations when I forked out the 2 grand. However the results are fantastic, 100% repeatable zero, those turrets can be used in low light without even looking at them. My 2 cents.
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