classic 68 need help wuick

[gray element]

I just played paintball again yesterday and will be until about march when i gets too hot, its been like 6 months since ive played though. My mag is shooting very poorly. Im using fairly bad paintballs but ive always used the same exact brand paintballs for the past idk 2-3 years or so and ive never had a problem till now i also shot some of my friends i think they were diablos or something like that but i got the same results. I know im supposed to change all the o-rings and etc which i did. Then I cleaned it well and oiled it up and all the internals look good, yet it still shoots poorly. (i did this friday). By poorly i mean, bad and i mean bad drop off, and basically zero accuracy and consistency, while using nitro. (maybe co2 would be better). I toyed with the velocity for wuite a while but to my disappointment it didn't solve my problem.I was thinking maybe i dont get consitency etc because i didn't screw my tank in all the way, but i can't screw it in anymore because of the pressure for the hpa i guess, but after like 30 shots or so i can screw the tank in a little bit more. ( is that a common problem, if so how can i fix it?) Would an on/off drop foward or something do the trick? And what should i do about the mag itself?
your responses would be greatly appreciated.

[athomas]

Compressed air is better than CO2.

If you are having problems screwing your tank into the ASA, there is a problem. If the pin doesn't get fully depressed, it will starve the gun causing shootdown and consistency problems. If the threads are damaged, try to deburr them. Apply a tiny bit of lithium grease to the threads to help with the friction. Once you get the air supply properly attached and working, we can move on to the next spot of trouble shooting.