mcarterbrown.com  

Reply
 
Thread Tools Search this Thread
Old 11-19-2012, 08:37 AM   #31 (permalink)
not your average redneck
 
tippmannrocker90's Avatar
 
Join Date: Sep 2011
Location: Bucks Co.

Quote:
Originally Posted by ta2maki View Post
Not holding on to the pump allows to bolt to move back when firing. This closes the passageway between the valve and upper tube, reducing the noise.
Doesn't not holding the pump handle reduce the fps though? or is that must a myth?
__________________
Tri State Mafia
Slaying many in the name of the smoking skull
Proudly sponsored by COUSINS PAINTBALL
Like Us on FACEBOOK
https://www.facebook.com/#!/TSMPaintball
tippmannrocker90 is offline   Reply With Quote
Old 11-19-2012, 01:03 PM   #32 (permalink)
Sidewinder Hoarder
 
toymachine's Avatar
 
Join Date: Dec 2010
Location: Fascist Valley

Hehe, sorry to derail this for a little bit, but I'm still concerned

How does the bolt moving back close off the valve? You mean, when the bolt moves back, the air passageway that connects the valve opening/output to the bore behind the valve? In that case, I get it. I'll have to try that! Seems like one must be careful though - obviously moving the bolt too much towards the open position could screw things up, such as letting the bolt slide back just as one pulls the trigger, thus closing the valve port off early and decreasing fps.

I know, for a fact mind you that when it comes to nelsons, having the breach even the smallest bit will reduce fps. But a sniper isn't a nelson, although I must say the reason I've added all my return springs is to, on the ccm make it easier for me to a/t (my pref, that's all), but on the others keep the bore sealed so I don't lose fps. Actually that has been somewhat of a recently development - things changed when I started using hpa 90% of the time over co2 due to local availability/cost. Never noticed a need for the springs with co2, so now this is all making sense... Given co2's low, compared to hpa, rate of expansion, maybe that has something to do with it?

Anyways, thanks for the tips guys!
toymachine is offline   Reply With Quote
Old 11-21-2012, 03:46 AM   #33 (permalink)
Seasoned Member
 
paintball_fiend's Avatar
 
Join Date: Feb 2007
Location: Logan Utah

Quote:
Originally Posted by tippmannrocker90 View Post
Doesn't not holding the pump handle reduce the fps though? or is that must a myth?
not holding the pump handle loweres the fps on all of the snipers that I have ever owned. It is not enough that it really matters and the sound signature is quieter but I always chrono holding the pump forward. I do use a light return spring.
paintball_fiend is offline   Reply With Quote
Old 11-21-2012, 05:42 AM   #34 (permalink)
MaD
MCB Member
 
MaD's Avatar
 
Join Date: Oct 2007
Location: A2, Michigan

Quote:
Originally Posted by paintball_fiend View Post
not holding the pump handle loweres the fps on all of the snipers that I have ever owned. It is not enough that it really matters and the sound signature is quieter but I always chrono holding the pump forward. I do use a light return spring.
Depends on the set up. It makes no difference in FPS on one of my guns. I do have a medium return spring. It does greatly reduce the sound on that gun. The gun was annoying loud and since I pretty much always hold the pump handle I wanted to figure something else out. I'm now using a modified jam bolt for the same effect. It works remarkably well and it's one of the most consistent guns I've ever owned.
__________________
-= MaD =-
Sheridan Seals, Valve Tools, and Parts
Feedback
DIY Paintball Stuff!

Note: While I would love to take credit for his work, I am not associated with Mad Customs!
You can contact BigMatt-MadCustoms in his MCB forum
MaD is online now   Reply With Quote
Old 11-22-2012, 01:54 PM   #35 (permalink)
Sidewinder Hoarder
 
toymachine's Avatar
 
Join Date: Dec 2010
Location: Fascist Valley

Gotten my old a$$ '97 cocker out and running (only body/bb actually from 97 tho). Honestly, it must be specific to loud cockers, because the only thing I don't get holding the pump forward when shooting is a loss in efficiency. Makes no difference in terms of sound for me, the shooter, or the target downrange, the significant other

I thought it might be as I've got it up for CO2, running LP at just about 200psi, given co2 takes bit longer to expand than hpa2, but I noticed no difference when I switched to hpa. In both cases I was running an aka valve/volumizer along with an al lightening bolt. the hammer was of the rex adjustable variety. to note I did switch inline regs and valve stems/cup seals when going from co2 to hpa as I didn't wait very long. Same operatives pressure was calibrated though, and I noticed a small drop in velocity when using hpa, like 5-10fps

So, yea, makes me think this only applies to some guns. I'll see what happens when I break out the old 2004 black magic body cocker sunday, as I've set it up for HP operation (again CO2, but using a hp pps valve, stock bolt and tungsten hammer), so maybe that'll make a diff?
toymachine is offline   Reply With Quote
Old 11-22-2012, 04:16 PM   #36 (permalink)
Yes, that is a joke ---->
 
ta2maki's Avatar
 
Join Date: Jan 2007
Location: Sunny Southern California

CCM Fan
AKA Fan
Brass N Wood Fan
Palmers Fan
The results definitely vary on the gun, both in parts used and how they are tuned. Most that I've come across fps goes down when not holding the pump. My regular gun, there is no difference. I've had one where not holding the pump caused an increase in fps. Made me look like an idiot. I was explaining to the guy why he should hold the pump forward when chrono-ing. His gun wasn't very consistant, but the average fps went up around 10fps. Weird.
ta2maki is offline   Reply With Quote
Old 11-23-2012, 01:32 PM   #37 (permalink)
Active Member
 
surein's Avatar
 
Join Date: Apr 2011
Location: Toronto

I use a Palmer LT valve and spring, Freeflow hammer, deluxe valve nut with the oring, blue hammer spring and a freak bored 14" UL on my halved outkast. Quietest pump on the field. It's like a blow dart
__________________
_______________________________________
Feedback
surein is offline   Reply With Quote
Old 11-23-2012, 01:54 PM   #38 (permalink)
Sidewinder Hoarder
 
toymachine's Avatar
 
Join Date: Dec 2010
Location: Fascist Valley

love that LT valve, and happy to another using a ff hammer - is yours also their tungsten model
toymachine is offline   Reply With Quote
Old 11-23-2012, 03:08 PM   #39 (permalink)
Active Member
 
surein's Avatar
 
Join Date: Apr 2011
Location: Toronto

Quote:
Originally Posted by toymachine View Post
love that LT valve, and happy to another using a ff hammer - is yours also their tungsten model
yeah heavy tungsten great for half blocks
__________________
_______________________________________
Feedback
surein is offline   Reply With Quote
Old 11-23-2012, 03:18 PM   #40 (permalink)
Doesn't work for Avratech
 
ApoC_101's Avatar
 
Join Date: Aug 2007
Location: Vancouver, BC

I just turn the velocity down to like 200 FPS and bingo, ninja mode. Gotta shoot em in the neck at point blank for maximum ninja effect, and to make sure it breaks
ApoC_101 is offline   Reply With Quote
Reply

  mcarterbrown.com » Paintball » The Armory » Pump Markers

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -4. The time now is 10:41 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO
© MCB Network LLC