Post number 24 was an estimate. I have tested the matrix 175 here is the info for my testing.
My friend who has a similar test method as me has tested the 165 matrix at the following,
That would make the G7=.319
Good luck, make sure your scope tracks when your figuring out your drop data, if the click values are off on your scope it will mess up your solutions from your ballistics program and you will be chasing velocity and BC numbers trying to get it to match.
Mulehunters numbers are a dang good place to start IMO, depending on the program you use it will get you out there a ways. With the 165 I can use a G1 BC of .650 in Loadbase and it will be nuts on to 1890 yards, using Applied Ballistics program a G7 BC of .314 work very well this last weekend shooting 1001 and 1890 yards, a G1 needs to be stepped to get out there that far.
Very fun shooting a 270 WSM that far, it holds it own rather well!! I just passed 800 rounds on this barrel and the throat is holding well!!