That process is very similar to the process I've settled on to minimize time, expense, and loss of barrel life. I also add a chronograph to the process because if I'm not also getting low ESs and SDs, then I know the load won't perform at long range. The two shots per load during the workup process provides a first glimpse at ES, and I have found that low ES will often coincide with the nodes. I wouldn't say every time, but probably more often than not. One other difference. I shoot at 300 yds rather than 200 and select wind-free or low wind conditions. My range is somewhat protected by trees on both sides and wind hasn't proven to be any big issue for me at 300 yds. Besides, I'm most interested in loads that shoot with minimal vertical separation, as has been stated.
My cartridges typically have larger powder capacity than the ones mentioned here, and I'll increase powder increments to 0.5 to 0.7 gr on the first round of incremental powder charges.
For those shooting heavy-for-caliber high BC bullets, refer to the below thread
for an explanation as to why farther distant load development ranges, 300 to 500 yds, are better for truely long range load development. The high BC bullets out of fast twist barrels often take some time to settle down, and loads that shoot 0.75 moa at 100 yds may actually shoot less than 0.5 moa at 500-1000 yds. Here's the link:
.277" 169 wildcat bullet
- one last point. With the larger cartridges, it's important to mention that a person needs to keep the barrel relatively cool during the load shooting process. Kind of a pain in the rear. But if you want to have confidence that your groups will represent the loads cold bore accuracy performance in hunting conditions rather than rapid-fire conditions, I think it's pretty important. Also, with any thinner-tubed barrels, accuracy will often go to pot after the third shot if you don't allow the barrel to cool down. Then all you're doing is wasting time and ammo - because none of the groups will yield an inkling of your rifle's performance potential with any of your test loads.