IF you had a bad seal it would be very violent, but you would certainly notice so we'll think it's all just fine inside.
Sounds like the nature of the beast. Gas ram's esp. magnum powered have a very sharp jolt, more so than the same rifle with a spring ( you could go with a spring but you'd be better off just trading).
Think of all that motion as " crisp" "spring" .
You could let a bit of psi out.
John