Velocity too high

[xtremepballman27]

I have a rebel and they guy at the store told me my velocity was too high bu just putting his hand over the barrel which has no porting. I had play just a few days before and i shot my friend right in the hand and he said he could barely feel it. The guy tells me that i need to go chrono my gun and cut the springs and my parents wont help me or take me to get it chronoed. I have and expansion chamber on my gun and the guy says that there is too much pressure and that the back of my gun is going to blow off. He says its becasue of the temperature (here in GA). He says all guns are like that. what should i do? I dont have much support from my family and the guy isnt very good.

[Thor the Mighty]

your parents suk!
my parents suggest to me every like week or so that i should go paintblaling, but i never can because i don't have any money!

damn!

[xtremepballman27]

dude, dont flame my parents. Tell me what I should do.

[Saiyan_warrior]

Umm..Only thing I can think about is buying a chrono if you got the $$$.

[Savior]

go to your local field, they usually have chronos there. you can chrono it there :)

[fear my impulse]

well, obviously all the air is gonna come out of one end of the barrel because there is no porting. get one with porting, and the balls behind it will come out better. or just raise the velocity of the gun. the back of the gun won't blow off. if it does, well, it proved that there was too much pressure in the back. to me, cutting the springs would lower the velocity, right? later.

[xtremepballman27]

i dont know what to do. you cant tell if a gun is over pressurized just by putting your hand on the end of the barrel and shooting can you? and anyway my barrel has no porting so all of it has to fit through 1 hole. this guy makes no sense to me

[fear my impulse]

well, all i can say is to buy a better barrel. one that has porting. compare the air coming out from the one with porting, to the one without. you will probaly notice a difference. as for the pressure, when co2 heats up, it expands. when you try to rapid fire, the co2 gets colder and condeses so you experience a drop off in velocity. if you were firing a string at your friend, that could be your reason why he said he barely felt it. and, if you are shooting a string through a non-ported barrel, the balls behind the first one will have a bit of a turbulence, slowing them down because the air hasn't escaped till the first ball comes out. this is where porting is needed, it lets the air escape before and after the ball is shot. that way the balls go just about the same distance everytime. but it's the bore size that matters in accuracy. that's why the freak is the most accurate.


100th post! yippie!!!!!

[Silent Knight]

Ummm... ok


xtremepbman27, did the guy actually chrono the gun? sounds like he just put his hand on the barrel, and used his psychic powers to predict the FPS of your current set up. take your gun to a field and have it chronoed, and adjust it as necessary. Also did you buy the gun from somone, or did you buy it brand new?

[Wasimodo]

It sounds to me like the guy is full of it. I haven't heard of putting your hand over the barrel and shooting it (I did that once and it kinda hurt, so I don't know how he could put his hand right on the end of it and tell your FPS). Also, I haven't heard of the backs of guns blowing off from simply putting on a tank. And fear: sorry to shoot down your post, but some guy did an analysis on the physics of paintballs, listed at this site:

http://www.paintcheck.com/articles/protips/range.html

Scroll down to the vented barrels section and you'll see that ported barrels don't raise velocity, they lower it. It also explains the myth that ported barrels equalize the pressure in front of the ball. To brief it, it states that as the air goes through a ported barrel it is solid, and the holes don't equalize the pressure.

[ry_goody]

Xtremepaintballman, your guns back won't blow off... pressure doesn't even go in the back of the gun... it stays in the valve. Also, before anything on your gun would blow the rupture disk on your co2 valve would of blown... that guy is full of ****. Don't cut your springs... usually what I do when I am playing with my friends and I don't have a chrono. I hold 2 guns side by side and shoot them and if the arch and the distance the ball shoots is about the same... then there velocities are about the same.

[fear my impulse]

thanks for the correction. i knew that AGD did do a test on ported barrels and such. i read it in some mag bout a month ago. but what i didn't say: that it rasies the pressure. but thanks! now i know. later.