Tried above.
Recently made dummy cartridge by dropping Hornady 162 gr sst into chamber butt first and set a
new once-fired resizws case on it by closing the bolt.
Used a Sinclair hex nut to get the bullet diameter to case head length and compared against factory, measurement was almost .09" longer.
Worked up some load using 4064 powder for deer hunting in Michigan, using the determine length
and @ 50 yds, was getting quarter sized groups, waiting for weather to get back out a get final loads for both the downloads and MAG loads.