Almost all springers have a degree of hold sensitivity. It’s the felt movement of the piston slamming into the receiver and thus thrusting the gun forward into the hand or rest. Many factors reduce or induce this behavior. The gun can be tuned to optimal behavior for that model. Trying to achieve the balance between power, weight of the gun, velocity, caliber, tuning, pellet selection and consistency is the challenge of a springer. An example of the three models you mentioned. The 30,50 and 95 are probably the most favored barrel cockers because they are all three well designed to be in that perfect balance for a springer. The caliber chosen however will greatly impact the hold sensitivity. The larger/heavier the pellet the slower it moves. So the longer it’s in the barrel after the piston has slams home. The movement of the action is felt a moment longer and holding steady that extra time takes practice. This is just the tip of the iceberg when talking about firing behavior and hold sensitivity. That is why springers are a love/hate airgun.