Reason forshooting POA of musket/arquebus against mounted?

[kvnrthr]

Why do muskets and arquebuses get a negative modifier when shooting at mounted troops?
I can't think of why firearms would be less effective than bows or artillery at shooting cavalry.
Is there any particular historical or balance reason for it?

[rbodleyscott]

Why do muskets and arquebuses get a negative modifier when shooting at mounted troops?
I can't think of why firearms would be less effective than bows or artillery at shooting cavalry.
Is there any particular historical or balance reason for it?

Well yes. They proved too effective vs cavalry without. (Bearing in mind that cavalry cannot effectively frontally charge steady pike and shot).

Also bear in mind that 17th century shooting drills were very slow, and cavalry would not in reality stand around long enough to receive many shots.