Find fields & stores near you!
Find fields and stores
Zipcode
PbNation News
PbNation News
Community Focus
Community Focus

Reply
 
Thread Tools
Old 01-19-2013, 11:18 PM #1
bracer028
 
 
bracer028's Avatar
 
Join Date: Jan 2007
Am i underboring too much?

When i pump, I push the pump handle forward, I feel tension when the ball enters the barrel.

Feels like I'm squeezing it too much. Would this lead to chops?
bracer028 is offline   Reply With Quote
Old Sponsored Links Remove Advertisement
Advertisement
Old 01-19-2013, 11:43 PM #2
tac0cat
ANGRY BEAR!!!! RAWR!!!
 
tac0cat's Avatar
 
Join Date: Jun 2005
Location: har!
it could lead to barrel breaks, and it could lead to wild curly shots in my experience. If you have a barrel kit, take a few balls in one end of your sizers and if you cant blow the ball through its probably too small.
__________________
USMC
tac0cat is offline   Reply With Quote
Old 01-20-2013, 12:23 AM #3
senghing27
Gosh Dang.....
 
senghing27's Avatar
 
Join Date: Oct 2004
Location: NOVA
 has been a member for 10 years
senghing27 plays in the PSP
senghing27 has achieved Level 1 in PbNation Pursuit
senghing27 has perfected Level 1 in PbNation Pursuit
I agree with Taco. You won't really get chops... But if you force a ball that significantly bigger than the sizer, it's going to get crushed by the bolt or break from all that force.
__________________
TRUST+320/-0
"Originally posted by XxAltecxX:
senghing- You are so good, they didn't even need to put you on the list because everyone already knew."
senghing27 is offline   Reply With Quote
Old 01-22-2013, 05:29 AM #4
drgonzo
Half-cocked
 
drgonzo's Avatar
 
Join Date: Nov 2004
 has been a member for 10 years
The previous posts are untrue, you can underbore to where you have to practically hammer the ball into the barrel and if it makes it out, it won't break or curve wildly. The point at which a ball does not make it out of a long-back barrel is about .020+ underbored, with a shorter back you can even go tighter before it won't come out.

That said, actually feeling the paint drag happens at underbores like .012+ which is not ideal. The blow test finds a sizing for almost no underbore, which is also not ideal. It should be quite difficult to blow the ball through if not impossible with an underbore.

The biggest deal about it, to me, is you want the pump stroke to be smooth, because that affects your pumping reliability and timing (avoiding chops, for example), so you might as well bore up if you feel it.
__________________
PUMPPB.COM - Pump paintball forums
HawaiiPB.com - Paintball forums for the state of Hawaii
HawaiiPB/PumpPB - Our videos | Droidtiles.com - NFC Tags for Android and mobile devices

Last edited by drgonzo : 01-22-2013 at 05:31 AM.
drgonzo is offline   Reply With Quote
Old 01-22-2013, 06:46 AM #5
senghing27
Gosh Dang.....
 
senghing27's Avatar
 
Join Date: Oct 2004
Location: NOVA
 has been a member for 10 years
senghing27 plays in the PSP
senghing27 has achieved Level 1 in PbNation Pursuit
senghing27 has perfected Level 1 in PbNation Pursuit
Quote:
Originally Posted by drgonzo View Post
The previous posts are untrue, you can underbore to where you have to practically hammer the ball into the barrel and if it makes it out, it won't break or curve wildly. The point at which a ball does not make it out of a long-back barrel is about .020+ underbored, with a shorter back you can even go tighter before it won't come out.

That said, actually feeling the paint drag happens at underbores like .012+ which is not ideal. The blow test finds a sizing for almost no underbore, which is also not ideal. It should be quite difficult to blow the ball through if not impossible with an underbore.

The biggest deal about it, to me, is you want the pump stroke to be smooth, because that affects your pumping reliability and timing (avoiding chops, for example), so you might as well bore up if you feel it.
As with anything paintball, your mileage will vary. I guess my previous post where toward a worse case/hammering paint into the barrel like the OP's post.

I personally underbore about a sizer down from whatever match would be. I'd use a .680 insert on paint that is roughly at the .682-.684. Most of the time, I would have no issues, but once in a blue moon you'll get that one paintball that is the bad apple of the batch and it gets hammered into the barrel and goes nowhere.... or if it makes it out of the barrel in my experiences, it hasn't been too straight of a flight path.

I also had a handful of instances in which brittle paint would swell a bit and it won't enter the sizer/back and goes kasploosh in the breech.
__________________
TRUST+320/-0
"Originally posted by XxAltecxX:
senghing- You are so good, they didn't even need to put you on the list because everyone already knew."
senghing27 is offline   Reply With Quote
Old 01-23-2013, 09:40 AM #6
Castro #66
Not a Moderator*
 
Castro #66's Avatar
 
Join Date: May 2005
Annual Supporting Member
Castro #66 is a Supporting Member
Castro #66 is playing at Living Legends VII
Castro #66 supports Bob Gurnsey
Castro #66 is one of the top 500 posters on PbNation
Castro #66 is Legendary
Castro #66 is attending Decay of Nations VII
So the answer is "Probably not". What brand of paint is it? Most lower-grade paintballs are stiffer and therefore less flexible when pushed into the barrel.
__________________
Certified Master Airsmith
Airsmithing & 3rd Party Shipping - PM for details
Can't we all just play Paintball?


Castro #66 is offline   Reply With Quote
Old 01-23-2013, 10:21 AM #7
Pdubs
I am Philosoraptor
 
Pdubs's Avatar
 
Join Date: Apr 2011
Location: Arden NC
Pdubs is playing at Living Legends VI
Pdubs owns a Planet Eclipse Etek
Pdubs is for the Gunfight
Pdubs has achieved Level 3 in PbNation Pursuit
if you're playing pump, inspect your rounds before hand to insure that there aren't any dimples or abnormalities. Just put those aside and use them for when you play semi or electro.
Pdubs is offline   Reply With Quote
Old 01-23-2013, 12:28 PM #8
hondaxr88
 
 
hondaxr88's Avatar
 
Join Date: Jan 2013
Location: Atlanta, Ga
hondaxr88 owns a Planet Eclipse Ego
What bore? and what paint? I feel like the consistency of the paint is the biggest determining factor as to how much you can underbore. Really, you are underboring too much if you are getting breaks as a result.

And it doesnt take THAT much to start having barrel breaks with brittle/tourney paint. The evil I shoot passes a blow through test for about a .683-.684 diameter, and shoots great through my .679 insert, but will start blowing itself up once I drop from .679 to my .677 insert. Not exactly a .020 difference claimed above.

Also, type of breech makes a difference. With the breech on the phantom, I feel like I can't underbore nearly as much because the ball actually sits right on the edge of being fully loaded into the barrel when the bolt is all the way forward(as opposed to the cocker, which actually loads the ball all the way into the insert with the bolt). This makes it a little more violent to significantly underbore than 'cocker based pump, as the ball has to go through compression into the barrel while being fired instead of during the pump stroke (which, unless you are being super violent, should be significantly more gentle).

Last edited by hondaxr88 : 01-23-2013 at 12:33 PM.
hondaxr88 is offline   Reply With Quote
Old 01-24-2013, 12:34 AM #9
bracer028
 
 
bracer028's Avatar
 
Join Date: Jan 2007
Quote:
Originally Posted by Castro #66 View Post
So the answer is "Probably not". What brand of paint is it? Most lower-grade paintballs are stiffer and therefore less flexible when pushed into the barrel.
Evils.
bracer028 is offline   Reply With Quote
Old 01-24-2013, 10:18 AM #10
Castro #66
Not a Moderator*
 
Castro #66's Avatar
 
Join Date: May 2005
Annual Supporting Member
Castro #66 is a Supporting Member
Castro #66 is playing at Living Legends VII
Castro #66 supports Bob Gurnsey
Castro #66 is one of the top 500 posters on PbNation
Castro #66 is Legendary
Castro #66 is attending Decay of Nations VII
Tough call, then. Every once in a while I have the same issue with various brands, but it's usually 1 in over 2000 balls.
__________________
Certified Master Airsmith
Airsmithing & 3rd Party Shipping - PM for details
Can't we all just play Paintball?


Castro #66 is offline   Reply With Quote
Reply


Thread Tools

Posting Rules
Forum Jump