The problem is as written you cant do this. The two weapon fighting rules only apply to melee weapons. The crossbow expert feat only applies if your crossbow is preloaded as you attack with the sword. You cant load it on round two.
This is ineffective past level 5. You can't reload either crossbow without a free hand; thus, you can't get your second attack from Extra Attack if you're using two crossbows. (Also, you have to have Crossbow Expert to even try it. The two-weapon fighting rules specify melee weapons.)
There really isn't a good way of dual wielding crossbows in 5E. The hand crossbow fighter build uses a single crossbow and takes advantage of a loophole in Crossbow Expert: A hand crossbow is a one-handed weapon, and Crossbow Expert doesn't specify that the hand crossbow has to be in addition to the one-handed weapon. They can be the same weapon! So you use a single hand crossbow for both the Attack action and the bonus action attack, leaving your other hand free to reload. This has the additional advantage that if you find a magic hand crossbow, you can use it for all your attacks.
I disagree. Crawford has been very consistent in explaining that a bonus action triggered by an action can come at any time during the round. So assuming you have the Crossbow Expert feat (this does not involve the two weapon fighting rules) you can use a bonus action to fire a crossbow at any time during the round provided you are going to or have already triggered it using the attack action (and the feat doesn't specify ranged attack). Yes, the crossbow must be loaded, but you are free to load it once your hand is free, and your hand is free after you sheath your longsword.
I think Jester Canuck's analysis is sound. You can attack with a longsword and crossbow using the crossbow expert feat. However, you need to start the encounter with the crossbow in hand. And you can't interact with any other objects during your turn.
I suppose we should ask Crawford if it works, for clarity.
actual rapier + hand x-bow style that the feat was meant to encapsulate.
Seems you and me are on the same page, Leatherhead. I feel your pain.Let me tell you about crossbows in 5e.![]()
If you are referring to me, yes I read his post (assuming you talk about post #5 in this thread).Hiya!
Did you guys just miss @DEFCON 1 's post? He pretty much nailed it in a clear and easy to understand manner.
^_^
Paul L. Ming

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.