Yesterday, I tested some loads for an old FN custom .270 I picked up recently. Picked a bullet many seem to consider pretty accurate, a Hornady Spire Point (150gr in this case) and a powder I already had that would give me my target velocity of 2700 or so without bending anything ( 55gr of H4831). Seating depth was determined by the Sharpie method. Two 3-shot groups went 9/16" and 7/8", followed after adjusting the elevation a tad on the M8 4X with a 4-shot group just under 1 1/4". I'll check the POI again before going hunting, but I'm done with this one. Loaded up the rest of my prepped cases, which should suffice for a while. Don't see how futzing around trying to squeeze out another fraction of an inch from this 50 or 60-something rifle will accomplish anything of importance.
OTOH, my new range toy, one of the $250 Brownells Howas, will be futzed with a good bit once enough innocent forest creatures have been converted into tasty comestibles. Here, that starts next Satuday.
