[Coconut]

NVM. Shoulda read just one post earlier.

This post has been edited by Coconut: 26 August 2009 - 07:59 PM

[thumper]

I ran a small test today..

marker : 98 Evolution Sniper, PPS stab @ 350psi, Belsales valve, Belsales ventuti bolt, co2, temp : 87 degrees, big red chrony

paint: Procaps Visible Impact - solid orange shell, pink fill - small (75% roll outs on .679)

maybe 6 balls w/ each barrel, swapping barrels back and forth twice.
firing slightly uphill to ensure no roll out effect on velocity.
------------------------------------------------------------

12" new style kaner .682 w/ nail polish wedgits : velocity 270-272

10" freak w/ AA tip and .679 aluminum insert : velocity 260-264

From what I gather here is the longer kaners (7" I think) backs seem to improve efficiency relative to
a smaller bore barrel.

[BEASTY]

Maybe this will eliminate all "what berral should i buy" threads.

Thanks bryce!

[staypuft]

this goes out to bryce or cockerpunk, have you ever shot a sanchez machines sm1 orbium 2 barrel? the back is almost 6" they do have weird bore sizes, they have .680, .683 and .686. would this make some kind of difference since they are not the normal size bores?

[brycelarson]

staypuft, on 10 September 2009 - 12:43 AM, said:

this goes out to bryce or cockerpunk, have you ever shot a sanchez machines sm1 orbium 2 barrel? the back is almost 6" they do have weird bore sizes, they have .680, .683 and .686. would this make some kind of difference since they are not the normal size bores?

I would assume performance like the CP two piece kit. those has a 5.5" back.

as to the sizes - no, they should land right in line with every other kit. basically, if the control bore is the same length and porting is similar - then they should fall right into line - the smaller the bore the more efficient.

[staypuft]

So underboring would still be good when using apex tips? Would it affect the back spin since it is being squeezed out of the barrel and not so much as to being pushed out

[TROPICALPUMKIN]

do scratches on the inside of barrel front effect accuracy

[D.K.]

TROPICALPUMKIN, on 28 September 2009 - 11:22 PM, said:

do scratches on the inside of barrel front effect accuracy

nope (i've read your thread)

[brycelarson]

TROPICALPUMKIN, on 28 September 2009 - 11:22 PM, said:

do scratches on the inside of barrel front effect accuracy

at some point - yes, it looks like they might. the one barrel that we had shoot poorly had a very poorly honed interior. you could see variations on the inside finish of the barrel. it wasn't smooth and shiny. so, from that I would assume that scratches, at some point, would effect how the ball leaves the barrel. the direction and location on the interior might change how many and how deep those scratches need to be to have an impact.

now, normal wear and tear on barrels haven't shown any changes. We've shot barrels that were brand new and barrels that were heavily used. the normal surface blemishes that you see inside a barrel don't seem to have any effects.

what kind of scratches are you talking about?

This post has been edited by brycelarson: 29 September 2009 - 08:11 AM

[TROPICALPUMKIN]

They were caused my a squeegee and it is one that is the most noticable in the barrel front(luxe) there are none in the insert the scratch is in the shape of a circle
it was caused by one of these squeegees the rings on it are plastic http://paintballgate...rayacaputh.html

also would polishing the inside of the barrel get rid of these and if so what king of polish and will if affect the barrel at all

[brycelarson]

most barrel fronts are HUGE. If there's a place in a barrel where a scratch won't matter - that's it. The ball shouldn't really be making contact with that portion of the barrel.

[Leafy]

brycelarson, on 30 September 2009 - 08:30 AM, said:

most barrel fronts are HUGE. If there's a place in a barrel where a scratch won't matter - that's it. The ball shouldn't really be making contact with that portion of the barrel.

no kidding I'll get a pic of my empire 18 inch front, I think they had a tool collision on this one and just sold it as a second (the reason I got a whole barrel for 15 dollars shipped brand new), its really ugly in the front.

[Bob Long Vice]

brycelarson, on 07 August 2009 - 08:15 AM, said:

UV Halo, on Aug 7 2009, 01:07 AM, said:

Agreed! Great Video

I have a suggestion in regards to future testing on the effects of porting (volume, efficiency, etc). If possible, isolate the bore types (stepped vs non-stepped). Since a stepped bore barrel will allow air and sound, to slip by the ball as the ball moves through the front. While an underbored barrel will force the air to exit through the porting all the way until the ball leaves the barrel.

we've never found an optimal test arrangement for porting testing. we really need 3 or 4 identical barrels - from non to heavily ported. and then we need a second set that's either stepped or two-piece.

No company offers that - they mostly just design one porting pattern and go with that. It's prob a custom thing - so if anyone knows anyone who's making custom barrels - let us know.

i hate to say this but smart parts freak to the freak jr

i hate smart parts thats why i dont wanna say that lol

[LieutenantDan]

Bob Long Vice, on 28 November 2009 - 10:37 PM, said:

brycelarson, on 07 August 2009 - 08:15 AM, said:

UV Halo, on Aug 7 2009, 01:07 AM, said:

Agreed! Great Video

I have a suggestion in regards to future testing on the effects of porting (volume, efficiency, etc). If possible, isolate the bore types (stepped vs non-stepped). Since a stepped bore barrel will allow air and sound, to slip by the ball as the ball moves through the front. While an underbored barrel will force the air to exit through the porting all the way until the ball leaves the barrel.

we've never found an optimal test arrangement for porting testing. we really need 3 or 4 identical barrels - from non to heavily ported. and then we need a second set that's either stepped or two-piece.

No company offers that - they mostly just design one porting pattern and go with that. It's prob a custom thing - so if anyone knows anyone who's making custom barrels - let us know.

I know for a fact that Stiffi is really nice about making custom barrels. You can call them up and ask them to make practically any bore size at any length with stepping or whatever. I'm sure they could have some fun with the porting if you asked them to.

i hate to say this but smart parts freak to the freak jr

i hate smart parts thats why i dont wanna say that lol