Thread: 75gr Amax 223, Ladder test question

First up,I am wanting to try develop a load for 75gr Amax in my 223, if anyone had some data to help me with a starting point would be great, otherwise going to use info on Hodgons website.

Next thing is, I am going to attempt to do a ladder test, seems to be the best way to find a good load with the least shots used, just have a few questions.
Considering the Amax is so stink'n long and like other VLDs can be very sensitive to seating depth, how is the best way to go about a ladder test.

Do you take a guess at seating depth off lands (say 10thou)work out what powder charge shoots best, then do another round of testing for seating depth?
Or would you start with seating depth ladder test first at a recommended powder charge then do another for the powder?
I know you would usually start with powder charge, but my research online suggests that is seating depth was not in a good spot for your barrel then may be a waste of time working out powder until you get a decent idea of seating depth.

Many thanks