I never, EVER, worry about COAL unless it is very close to max mag length. I only measure CBTO.
If those are ELDs or V-max, I have found big variations in bullet BTO in the same box. Drives me nuts. But as long as your CBTO is within .001" like your loaded rounds show, I wouldn't worry about it in the cartridge it looks like you are loading and light for caliber flat base bullets. Doesn't seem like those are LR rounds, so out to 500ish, you probably won't see enough of a difference unless you are shooting F-class/benchrest. But again, the round doesn't look like that is the case.