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Old 07-21-2011, 07:11 PM #1
Jhosgood
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To over bore.. or underbore... that is the question?

Ive heard so many mixed reviews i want to hear you as mini owners input on the best results you got from either over or under boring
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Old 07-21-2011, 07:14 PM #2
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Overborin provides less breaks, but you won't get ball on ball accuracy. Underboring can cause more breaks but when used with the eight paint will give you ball on ball. Just my 2 c
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Old 07-21-2011, 07:20 PM #3
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I underbore my paint with a .684 and I don't have barrel break issues, and it makes the mini relatively consistent
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Old 07-21-2011, 07:20 PM #4
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how about as far as efficiency and quietness goes?
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Old 07-21-2011, 07:24 PM #5
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quietness is more dependent on the amount of porting a barrel has.
more porting = quieter
less porting = louder / more efficient
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Old 07-21-2011, 07:31 PM #6
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Quote:
Originally Posted by groundzero_88 View Post
Overborin provides less breaks, but you won't get ball on ball accuracy. Underboring can cause more breaks but when used with the eight paint will give you ball on ball. Just my 2 c
Highly unlikely you will experience more breaks from underboring vs overboring. Also it is completely false that one method is more accurate than the other.
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Old 07-21-2011, 07:41 PM #7
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Only thing it will realistically affect is efficiency and SOMETIMES shot to shot consistency. Underboring will be more efficient.

If you have a good underbore or good overbore, shot to shot consistency will even be pretty much the same.

I prefer to underbore because I actually see less breaks that way, but I've never done any scientific tests to prove that out, just my observations.
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Old 07-21-2011, 10:34 PM #8
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I prefer to underbore when using my pump, but I slightly overbore when using my mini.

The way I see it, the chance of breaking paint is very small when I use my pump because I shoot 50 rounds a game. But when I use my mini I use upwards of 400 rounds a game and I usually break somewhere between the 200-300 round range.

All this talk of under/over boring... shouldn't we just use the right barrel for the right paint?
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Old 07-22-2011, 04:05 AM #9
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All this talk of under/over boring... shouldn't we just use the right barrel for the right paint?
No, because of the slight variations from ball to ball you'll get the worst possible shot to shot consistency that way.
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Old 07-22-2011, 04:54 AM #10
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... looks like ill have to do a little research of my own at the field next time to see what i like best lol thanks for the help guys
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Old 07-22-2011, 08:32 AM #11
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i underbore with the lurker .678 barrel and have not broke a ball in 5 cases of RPS Premiums
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Old 07-22-2011, 03:06 PM #12
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Over boring has been seen to be more accurate but less efficient. Porting will be quieter but with most barrels will be less efficient.

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Old 07-22-2011, 04:51 PM #13
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Originally Posted by wowzerz View Post
Highly unlikely you will experience more breaks from underboring vs overboring. Also it is completely false that one method is more accurate than the other.
Here's a comparison of a .006" under-bore and a .014" over-bore.
They don't shoot the same bro.



You can skip to the .700" shot spread here, and the .680" shot spread here.
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Old 07-24-2011, 03:45 PM #14
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Quote:
Originally Posted by tlmiller View Post
No, because of the slight variations from ball to ball you'll get the worst possible shot to shot consistency that way.
True, because if you try to perfectly match, paintballs are never perfectly consistent and you will find that some balls will be underbored and some will be overbored. If you oversize or undersize the barrel, then you will have consistency.

In regards to breakage, I understand the testing that has occurred, but I have run into specific problems with tournament paint at PSP and NPPL. This was specifically with Ultra Evil (not the regular Evil you get for practice, the stuff bought off the trailer at tournaments). Recently at Chicago Open, if I underbore even a little, I get tons of barrel breaks, perhaps 4-5 per game. This would be balls averaging 0.686, trying a 0.682 and 0.686 bore. When I upsized to a 0.688, I still got 1 break every game or every other game.
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Old 07-25-2011, 04:28 PM #15
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Different tests come to different conclusions. The video above suggests overboring is better, Cockerpunk's testing on youtube shows underboring is better. What we can all agree on is that matching paint is a horrible idea and as long as you are consistently too big or consistently too small (within limit, obviously shooting paint that bores in at .689 will not work out of a .675 freak insert) you will not have any issues.
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Old 07-25-2011, 05:49 PM #16
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overbore all day

no accuracy issues
no breaks

been working for years why stop now?
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Old 07-25-2011, 06:40 PM #17
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Originally Posted by Paint_hore View Post
overbore all day

no accuracy issues
no breaks

been working for years why stop now?
Exactly my reasoning for underboring as well. As SKI008 stated, as long as you don't attempt to match bore you're good to go.
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Old 07-27-2011, 12:21 AM #18
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I agree!! Why change what your doing if it's working for ya!! Myself, i've ALWAYS found it better to overbore, and only barrel break's i EVER had in year's of tournament play was when i use ultra evil or evil and not alot at all, plus no accuracy issues, ALWAYS ball on ball, plus been doing it for year's now so there's no reason to change, and people who underbore probably say the same!! Just if you underbore and are shooting brittle paint like ultra evil and someone who overbore's get's barrel break's, won't it be twice as bad for the person underboreing??
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Old 07-27-2011, 05:33 AM #19
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Perhaps, it has gone the other way with underboring. In another event, I overbored slightly (.688 on paint that was .686) and was getting breaks every game with Ultra evil. Switched to .682, lowered pressure, and resolved breaking issue.

I have also seen that I can shoot through a break more easily if I am underbored.
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Old 08-07-2011, 11:44 AM #20
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I bought an Ifit kit for two reasons. Find the common bore size of the paint of the day....then go up one insert size. Accuracy....consistency.....no breaks with my Axe
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Old 08-28-2012, 01:32 PM #21
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Ok, if a ball can be blown thru the barrel with a little resistance, is that considered an under bore or paint matching? One thing everyone seems to agree with is that paint matching is bad. So help a brother out and tell me at what point of the blow thru the barrel test, becomes paint matching? Thanks
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