How to add a additive reload animation?

I am wondering how I can add my reloading animation on top of other animations or different poses ( on the same bones).
Example: while aiming the reload animation plays while the weapon is centered.
The reload is made in the idle pose and the problem I have is that the animation is no longer accurate while in the aiming pose. Is there a setup I could use to correct this?

Do you have mesh space rotation blend enabled in the layered blend per bone node of the state machine? I’ve found when I have that enabled and have done a firing montage animation it twists the body, having this setting disabled keeps the gun firing forwards.

Maybe you can attach a video/images of your issue?

It seems like an IK setup at the end of the chain was the solution. I had this misconception that using IK means locking the bones in place and that I can’t use it after the reload but after checking the animation content examples I realized what I was doing wrong. If anyone else want’s to do this I recommend checking the last example.