High, this is my first message and English is not my mother languish so sorry for any errors.
I have the LG110HP 40joule in 5.5 and there is a small recoil when you shoot.
You have to try really hard to notice, I think its the noise that makes you imagining things If i dry fire there is no recoil from the spring.
I placed on my gun two pellets one on top of the other and fired, they didn't move more than .5mm and still stood in balance.