I have top use almost all my strenth to get the co2 tight enuff to pierce but i don,t think its the guns fault, its these new damn powerlets(why i never run them except in this gun)
I think they made all the caps harder to pierce for more safety everyone i know if having probs with powerlets lately. i have to oil everyother one in my gun, if you look at the powerlet when you get it empty and out of the gun you will see the front cap was bent in real bad then barely pierced(most likely)
Its fine that you can slide the clip in with barrel back as the valve has a spring loaded front on it so it won,t hurt anything, i always slide barrel forward the put clip in then pull back barrel(makes it feel more like a real semi to me

Follow the trail of dead animals, and thats where i,ll be.