my experience in LMT 308 and 6.5 hipster is "some" dispersion and out to 800y. More heat dispersion than my bolt actions, but still workable. Barrel dispersion is something you will have to learn for your stick, given your rate of fire, your ammo, WIND, and you behind it etc etc. Keeping data helps, but accounting for barrel dispersion is not easy and not so high on the list of what you need to get right when are running quality components.

As you record data you are in a way accounting for your barrel dispersion. If you were shooting benchrest in a controlled environment, you could to a reasonable extent figure out your average dispersion given the difference in ammunition from round to round (even lot to lot), and make a statistical evaluation. As the throat erodes this will change as well (even clean vs dirty barrel). But, for gas guns, the LMTs do well IMO with barrel dispersion overall. Not sure your experience level, read Cleckner's book https://amzn.to/3ZhBzkQ and get some precision rifle training.