Greetings @Kimber 7mm_08,
I set up my Tikka T3 Lite with a Leupold 6x36 scope with the long range duplex a few years ago with the idea of it being an open country rifle. A load was worked up that produced 2,820 fps (860 m/sec) and zeroed for 200 metres. I ran the ballistic data and found that the first dot was on at 275 metres, the second dot at 360 metres and the top of post at 450 metres. Bracketing a deer body (say 400mm deep) from the cross wire to top of picket suggested a range of 175 metres and cross wire to second dot 288 metres. The idea of bracketing was not to estimate range so much as stopping me from taking longer shots and also stop me passing up closer shots that I had overestimated the range for. Later on I bought a rangefinder for the longer shots.
I wish I could give you a glowing report of the success of all this but to date it is untried. Unlike your time poor status I am time rich but unfortunately am fitness and mobility poor and the short armed bush walks I do are usually accompanied by my little Bergara single shot in .308. One day perhaps.
Regards Grandpamac.
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