Hey guys as you can see from the title im having problem with my reg. When i screw my tank(68/45) on my gun and turn on my asa my gun will charge up to 200psi fairly fast and then it will very slowly charge up to 300psi which i set my pressure to.Im guessing it takes like 1min or 2 to fully charge up. Once the gun is at 300psi i will start to rapid fire and then the guns starts to shootdown so to counter it I had turn my velocity up to it wont shootdown. If anyone knows what goin on please help. Thanks to any of you who can help with my problem.