# At what AC does GWM become ineffective? [closed]

For the mathematically challenged (me), is there a general, simple, easy-to-remember rule of thumb for when a monster's AC is high enough that you should not use GWM because the -5 to hit becomes too much of a handicap? i.e. Rule of Thumb: Don't use GWM against an opponent with an AC higher than 'X'? Or are there too many variables to make a general rule? If it matters, assume a strength-based generic mid level player with a +4 or +5 to hit.

• Reckless Attack is a barbarian ability that lets you get advantage on attacks in exchange for giving enemies advantage to attack you. There's no -5 involved at all. Were you thinking of the Great Weapon Master feat? (Also, by mid levels a +5 to hit is pretty pathetic, by that point you should probably be at +3 to +5 primary ability plus a +3 or +4 prof bonus...) Sep 21 at 12:12
• If you are looking for GWM/SS, this is a pretty good video and explains the math. The video is about BG3, but it references how to do the math in 5e. youtube.com/watch?v=rx4tSn6vbA8 Sep 21 at 13:28
• If this question is about GWM/SS, then this question on the mathematical soundness of the feature is a likely duplicate. Sep 21 at 13:56