Aye, physics does need tweaking, indeed! Not sure how you do the barrel tossing, atm but
- if this was in the player:
[it’s the default cylinder that is oriented not as we need - hence the 
Up vector]
- and this in the barrel:
[the directions are weirdly hard-coded here due to time-constraints]
- we could get a somewhat convincing:
When it comes to tweaking - here’s a kickstarter on physical materials:
- create a new one:
- double click it to open, and have a look at the tooltips to find out what the options do:
For example:
You could apply it to surfaces and / or objects.
- think slippery ice covered level.
- or the player gets a new ability that lets them toss bouncy barrels by applying a restitution intense physical material
Another idea for something like this is to treat the scene props as projectiles. You fire them as if they were bullets, and have the projectile movement component do the heavy lifting. This could get handy if you want to easily make an auto-targetting homing knife, for example:
Because why not.