Sporadic FPS

[secretweaponevan]

Alright I understand that I would be shooting hot if I didnt mimic rapid fire like the above procedure, but shouldnt the consistency be as good when your slow firing as you are when rapid firing because I cant even rapid fire more than 2-3 shots no matter how hard I try, thats crap if I have to live with 25fps jumps because I cant rapid fire 10 balls a string.
Dont most people shoot x vavlves semi auto one shot per pull when in rec games and such where 15 bps isnt necessary? Is their consistency horrible too?

Thanks!

Be sure to clean your piston area as athomas pointed out. That and ball to bore matching (as long as the paint is round) and you should have good consistency.

[lidocaine]

So it should be as consistent when slow shooting as when you do the proper chrono procedue, right?

[secretweaponevan]

So it should be as consistent when slow shooting as when you do the proper chrono procedue, right?

Nope. You should see greater fluctuations due to the gas cooling down. The proper procedure is the rapid fire simulation as you previously described.

Also, if you have an almost inaudible leak in your powertube, the quick method will definitely be the most consistent.

Be sure to clean your reg piston area.

[athomas]

Athomas, you do mean to take out the velocity pin again and clean inside there along with that spring pack, correct? If it is, what should I use to regrease them again when Im done cleaning them? Does any paintball gun grease suffice?

Take the velocity adjuster out of the back. This will allow you to remove the spring pack and the regulator piston assembly. Dirt in this cavity can cause fluctuations by impeding the movement of the piston. Only use light synthetic lubricant on the orings in the mag. Grease will gum up with dirt and cause issues.

[lidocaine]

Then why bother shooting a mag if you have to rapid fire 15 shots for it to be accurate?
Because I for one shoot quick bursts of like 3 at max and run, usually even one ball so if its not going to be accurate as when im rapid firing..

[athomas]

Shot to shot any mag should be consistent. If you shoot a single shot, it should be the same as any other single shot. If you shoot several shots in succession, after the first couple of shots, each shot should be consistent with the previous shot. Its the 2nd, 3rd and following shots in a rapid succession that change when compared to the first shot. Due to heating in the valve due to the fast recharge, the next shots immediately after a trigger release contain hot air which is a higher pressure than the cooled air, so the shots will be at a higher velocity. Each shot with the hot air should be the same as the previous shot with the hot air. As the air cools when you are not shooting, the pressure falls back to normal and the velocity also falls back to single shot values.

If you are only ever shooting single shots, each shot will be the same as any other. If you need a bit of extra range, hold the trigger after a shot. Then after you line up your next shot, release and pull the trigger immediately. The hot recharge air will give a few extra fps.

The amount of increase is dependent on the tank input pressure. The higher the value, the hotter the air gets and thus the higher the velocity increase.

[lidocaine]

athomas thanks for the excellent explanation.

[Madcat_MK2]

Alright, well after doing what athomas suggested it seems my mag is now firing with 1-3 fps differences pretty consistently. Only thing I noticed was at first my mag would not fire at all. So i took the bolt out, oiled the stem some and switched to the next size bigger carrier which leaked horrendously. I then returned to the original carrier with no extra oil added and it began to shoot as consistent as it does now.

Other then that I had no real problems except for some occassional leaking that goes away after I fire a few rounds and a few times when firing some pretty long strings, the bolt would not reset all the way and I had to stop firing and sometimes bang down on it and heard the click of it resetting. This normal sounding or something else going on?

[lidocaine]

thats good to hear, thanks for the update madcat.
If mine doesnt clear up next weekend ill have to try it too. 1-3fps diff. that is sick!

[athomas]

Other then that I had no real problems except for some occassional leaking that goes away after I fire a few rounds and a few times when firing some pretty long strings, the bolt would not reset all the way and I had to stop firing and sometimes bang down on it and heard the click of it resetting. This normal sounding or something else going on?

That is bolt stick which usually indicates that the carrier is too tight. You may have a faulty oring. Try a different carrier oring and retune the bolt setup.