Consistent hold means a lot so I shoot best if I practice more regularly...
Guys refer to an Artillery hold for springers which basically means, don't clamp down and try to stop the movement.
It's going to bounce backwards as the piston moves forward and forward when the piston stops. (which is why they kill scopes)
Just hold it gently and as consistently as you can and shoot a bunch.

The guys are telling you the truth, JSB ,H&N and department store Crosman are where I start.

If you get too much time on your hands and are unhappy with your pellets, the pellet sampler from Straight Shooters is a good way to test a bunch.
The 177 pack is from 6.4gr to 16.4gr for $25 but they do stab you for $15 or $17 shipping.
It might be worth it if you're house bound long enough and got a buddy to split it!!

"Camping places fix themselves in your mind as if you had spent long periods of your life in them.
You will remember a curve of your wagon track in the grass of the plain like the features of a friend."
Isak Dinesen