What are you referring to when you mention "it feels stiff"?
Originally Posted by canadian_nibbles
If you are referring to the impact force, you test that by holding something against the front of the bolt when you pull the trigger. If the object held in the breach is not held directly against the front of the bolt, then you could feel the full force and not the reduced level 10 effect.
If you increased the velocity setting (chamber pressure) to the point that the gun starts to cycle, then the starting force of the bolt will not be that great because you have barely overcome the bolt spring force. That is how the level 10 works. Sometimes, if there is bolt stick due to a carrier that is too tight, then the force to start the bolt moving is greater than the force to keep the bolt moving. In that case you could feel a greater impact. Any instances of bolt stick like that can be fixed by using a larger carrier size.
Except for the Automag in front, its usually the man behind the equipment that counts.