RE: What's your proceedure for working up a rifle load?
I do like handloader but in my experience accuracy is on a curve it gets better as the load increases and then drops off as max is approached ( again this is me and the powder I use) but then I have an area lets say between 32 and 34 grains that my most accurate load falls in then I start working from there 32.5, 33, 33.5 34. for my purposes 1- 1.5 inch is great and I stop there but if you want to see something smaller then you'll be doing it again. Lets say 33.1, 33.2 ect until you find the right load; from there you can play with seating depth.
I use the listed seating depth in the manuals. I can't help you there in finding how far out you can go but if you ask here they will help you. I do you know you have to measure your chamber and determine where the lands and grooves start it's the procedure I don't know.