Under or overbore

[snips]

just wanted to get a feel for what the paintball community go with when it comes to sizing up their paint.
I'm not looking to go into the why's and why nots or the science or reasoning behind it, I'm just looking for what the majority of players run with when it comes to paint and barrels.

 

[Kevin Winter]

I whack a 689 or 691 on and forget about!

 

[Mugged2Much]

I've gotten the impression that slightly misshapen paint gets more consistent velocity from underboring. That's just from my own quite unscientific observations though.

 

[emisnug]

I underbore every time. Last CPPS, I was using a .681. I don't think I've used anything below a .685 for a loooong while.

My logic (it may be flawed) is that since paintballs are slightly compressible, forcing them through a smaller barrel will create a nice seal and allow all of the air to push it instead of some escaping around the sides.

Then again, one of my mates overbores to hell for the same reasoning. It's all semantics - if you can't hit them with your paint from far away, get closer and then shoot them!

 

[baconquilt]

usually underbore. but not too tight.
Paint in the states is small anyway so no need for the bigger sizes.

 

[Canon Fodder]

Under bore on anything closed bolt, overbore on anything open bolt.

 

[emisnug]

I thought the closed vs open bolt thing was put to bed years ago?

 

[Canon Fodder]

It was but my pumps are all closed bolt as is my autococker, with closed bolt detents don't stop roll outs so you really need an under bore.

 

[baconquilt]

closed bolt FTW

 

[Canon Fodder]

clques FTW

Obviously, but breach or bore drop, that's the real question.