I tried doing exactly what you are wanting to try last fall. BC inconsistentcy made me severely limit my range when atmospheric conditions were changing. Accurately predicting first round hits wasn't precise enough for me to shoot at an animal past around 500 yards. I would have likely only...
I shot one last fall. Was having a frustrating day anyway on a load that was terrible and to top it off ended up destroying the chronograph. Was a good reason to upgrade to a magnitospeed. Should have upgraded sooner anyway.
If wind call isn't 100% I'm aiming for high shoulder. It offers a wide margin for error and most of the animals are going to buckle right in their tracks and never take a step.
If filters freeze they no longer work. If there is a possibility of freezing I use a steripen classic and a gsi microlite 1000 vacuum insulated water bottle.