I find the players VERY proactive in reminding me just how much damage the monsters have taken when they are keeping count on the damage.Got it. I thought when you wrote:
that you didn't ask all of the time.
Also by looking at the HP ranges for monsters in the DMG CRing table, it lets you know how much wiggle room the HP total for a monster has.
Neither. The person looking in the DMG would be the DM, the table lets them know how much wiggle room the monster's HP total would have for the purpose of adjusting said monster's HP prior to deployment while still falling within the general parameters of it's CR tier.What does this sentence mean? Doesn't the DM already know how many hit points each monster has, or is this a way for players to metagame know ahead of time a rough estimate of monster hit points?
Neither. The person looking in the DMG would be the DM, the table lets them know how much wiggle room the monster's HP total would have for the purpose of adjusting said monster's HP prior to deployment while still falling within the general parameters of it's CR tier.
Why would he do this unless he was creating his own monster and wouldn't he do that ahead of time, not during a game?
Doesn't the MM already tell him exactly how many hit points a given monster has? Doesn't the DM already know the exact number?
I'm not understanding your point as to when or why this would be done, especially at the gaming table.
I think what he is talking about is that while the MM states an exact number for each monster that is the average hitpoints it would have based on it's hit-dice. So looking at the hit-dice you can see the min. and max. hit-points it could have and keep in mind that range for the "wiggle room."