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Old 11-13-2013, 11:55 PM   #11 (permalink)
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Originally Posted by desertT1 View Post
'Same' will get you inconstant velocities. I'd go .002 under your smallest paint. Better to have various degrees of squish as opposed to some with squish, some fit perfect, and others have air escape around them. Punkworks said .005 is about as low as they'd suggest going, period.
Ok, I'm new to all this barrel boring stuff. Since I've started I've only really used stock barrels.
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Old 11-13-2013, 11:58 PM   #12 (permalink)
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For Pump: drop paint into your sizers/inserts until you have a few paintballs roll straight thru and then size one sizer/insert down.

Open Bolt Electros: I would size one size up.
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Old 11-14-2013, 12:51 AM   #13 (permalink)
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Iím a big fan of under-boring, even before I started shooting pump markers. I did a lot of experimenting with my AXE with different bore sizes using Freak inserts in a Deadlywind Fibur barrel.

I found when it was dry and warm I could drop 0.006. On more humid days I found 0.003 was more reliable.

I found under-boring yielded much more consistent shots and allowed me to drop my operating pressure from 200psi to 140psi, which made my AXE smoother and quieter. It also increased the efficiency so much I went to a 45/45 tank and never used my 68/45 again.
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Old 11-14-2013, 01:06 AM   #14 (permalink)
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Quote:
Originally Posted by superman View Post
semi is way different you are normally putting alot more paint through the same bore than most pump players. i would run the same size as the paint if not 1 size up. under boring with semi's usually have problems had a buddy try it a couple times and got a ton of barrel breaks. its not worth the hassle of having to clean your barrel if you don't need to.
i'd take that with a large grain of salt; too many unknowns in that statement (what paint, what condition, what bore, etc etc). underboring is perfectly fine, and is the ideal. consistent, and efficient.
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Barrels are like girls... Some people are just happy to have one that looks good. Or even one that everyone else likes. Other people want a tight, accurate bore to run their balls through.
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Old 11-14-2013, 02:03 PM   #15 (permalink)
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I just bore at .680 or .679... I shoot pump all the time though. Most modern paint is .685 to .681 any way.
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Old 11-14-2013, 02:11 PM   #16 (permalink)
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I just bore at .680 or .679... I shoot pump all the time though. Most modern paint is .685 to .681 any way.
.685, or .675? My local FPO paint has varried a little bit in make/model for the last few years, but I have used a .679 or more recently a .682 the whole time. So, if you have a typo in there, I agree with those sizes.
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Old 11-14-2013, 02:20 PM   #17 (permalink)
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I'm picking up a .684 insert to start with. Should I buy a full freak kit? I don't think I'd really need the larger sizes (.687-.691)
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Old 11-14-2013, 02:34 PM   #18 (permalink)
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Originally Posted by desertT1 View Post
'Same' will get you inconstant velocities. I'd go .002 under your smallest paint. Better to have various degrees of squish as opposed to some with squish, some fit perfect, and others have air escape around them.
+1 This is a very good point. And something that took me a little while to realize.
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Old 11-14-2013, 04:04 PM   #19 (permalink)
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Punkworks found that you can get away with up to a .008 underbore without increasing breakage I believe.
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Old 11-14-2013, 08:18 PM   #20 (permalink)
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Punkworks found that you can get away with up to a .008 underbore without increasing breakage I believe.
So if I had paint that was boring out at .689 I could safely use a .684 insert?
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