I've got a load for ABs in my .270 but not for my 30-06 yet. Since you are already playing around with seating depth I don't think I would be telling you anything you don't already know, but here is what I do for any load development after bullet selection. Use a reliable source (loading manual or on-line publication from bullet or powder mfg) to pick a powder and starting load. I tend to start near the middle of the load range. My preference is to ladder test for bullet seating depth first then powder charge loading at ,005, .010. .015,.020 off the lands. Many, maybe most, do it in the opposite order but pressures go up fast as you approach the lands so I prefer to get the seating depth first. After deciding on seating depth I ladder test powder charge going up a grain CORRECTION 1/2 GRAIN at a time. All shooting is 5 shots at 100 yds over a chrono. The best shooting loads always have good data (small SD and spread). The best load doesn't always have the best data but it won't be far off, and a load with bad data never gives a great group. When shooting I use an old fashioned egg timer and wait 3 min between shots. If I can't get a shot off in a reasonable time after chambering I pull the cartridge and let it cool before shooting it.