Animation faster and slightly off from blender to game

I don’t really know if this is a place I can ask this or not, it involves blender and animation both so im giving it a try. I play sims four and you can create custom poses and animations to use in game, So i have been working on a pose with an assault riffle accessory. I started from scratch no in game pose exports just a blank sim rig and i assigned the rifle to the ring finger as the accessory stated that it was in

in blender the animation is fine, not perfect by any means but I was satisfied with it…

https://www.youtube.com/watch?v=h4Iabp930zs&feature=youtu.be

But when i put it in game it’s clearly off the mark. I attached the accessory to the ring bone at the base of the finger, how do i assign it to a different bone, perhaps instead of the base of the finger it should have been set in the middle…im so confused ive never had an animation be off from blender to game before. Its also faster in game…

https://www.youtube.com/watch?v=60kh71DP6_U&feature=youtu.be

can someone explain how is it working in blender but not the game if its not something simple like the bone placement? i did place it on the ring finger :frowning: