Tippmann a5 low velocity issues

I bought a tippmann a5 in april and the first time i used it i only had a flatline barrel. It shot fine and i could easily adjust the velocity.

Now i have a a2 commando stock, a compressed air tank 48ci 3k psi, and use a remote coil. Last time i used my a5 i could not get my fps above 230. I even tried switching to co2 and i still couldnt get it above 240.
I was wondering if anyone knew what might be wrong.

I have the same issue too. It was working fine before I took it apart  and cleaned and oiled it, then put it back together.  Did anyone solve this issue?? Would polishing the rear bolt area help?

I did split the shell but am certain the springs were put back correctly..  I have a theory.. Maybe oiling the bolt seal creates a backpressure when it engages into the power tube making it slow down too much. I noticed the FPS falls especially after its cleaned.  I will try changing the main spring today and see if my theory is correct.

Truthfully, the Flatline operates best between 250-270, so really you are in range. However, you should not have to polish anything in order to get the FPS up. Two things come to mind, how old is the marker? Perhaps your main drive spring is worn out. If so, look into a set of Madman or similiar springs. They come 5 in the pack and some are stiffer to cause the bolt to hit harder, allowing the valve to be open longer, resulting in higher velocity. Secondly, check the tightness of your receiver halves. The bolts should basically be finger tight, no more. You can overtighten them.

ok, I see now you hijacked Fluhr's topic. I was getting confused.

I don't know guys, but I am yet to see a thread where this problem has been solved. I see the suggestions, but no answers saying the problem is solved.  I am about to give up...  None of the suggestions work for me..  Tippmann does not seem to have an answer either...

Sorry oldpbnoob, did not mean to sound awful. Tried everything with the FL, spring change, new powertube, polish... The works.. still struggling to get to 255. For about a month I was able to getup to the recommended 275. FL worked fine.  I've just not been able to get back there since. The only thing I've done is clean the bloody marker. At 255 the  paint is all over the place.. Thats the frustrating part. Will try the new varrel this week when I get the adapter.  Thanks for responding man.

Did all of that..  Had a Tippmann certified tech check everything and he could find no issues.  Used same HPA tank on 98 and had over 300 FPS, so tank ruled out as problem.  I believe the issue is the size of the paint, but have not been able to verify this.  My reason is simple, the 98 has a bore sizer which is .686. The FL is significantly larger. Will try to verify this later this week.

OK guys.. I think my theory has been validated..  It seems the size of the paint is a BIG influence on the velocity in a Flatline Barrel.  I tested a FL and Straightline (hammerhead) today with various bore sizers on the SL and paint sizes on the FL.  The FL was not able to get up to 275 with small paint, but does get up to that speed with larger paint.  This I assume is because the bore size is nearly .69-.70 and so alot of pressure is lost around the paint.  The SL with bore size .686 shot the same paint without vel adjustment at a rediculous 330 FPS. Put the FL on and back down to 235. So if you have a FL and can't get the vel up to the recommended 275 (in manual) try a firm, larger paint.  From my rough measurements, you need paint thats around the .69X size to get the velocity up. Can someone else validate my findings please as this I believe would help alot of FL owners...

Thanks, I am aware of that.  I was using the tank directly attached to the ASA. No remote.  Same tank for both the FL and SL.  I a now pretty sure the low velocity at least in my case is a paint size issue..