First off, welcome to TheFiringLine!
Good to see the 135gr hydra shock performed well since it has been my carry round for the past few months. I was also surprised at how well the .22 ammo performed, especially since it is bulk ammo. Since you asked for suggestions you could always try wrapping some of the ballistic gel with denim to mimic the effect of clothing.
By the way, what did you use for ballistic gel? I have been interested in doing a few tests myself.