boring and shortening 8in sp venturi barrel

fog · 10-21-2007, 11:38 AM

Im considering having a barrel milled to accept freaks and cutting the barrel at the 1st port (closest to the marker)as ive heard if a ball breaks it sprays paint on ur mask any issues w/doing either? and a estimated price ?Also i think i know the answer but i was told (by a pb shop owner)that shortening the barrel will decrease distance an accuracy.
Opinions please

Mespllingesnogud · 10-21-2007, 12:13 PM

velocity could decrease by a small amount, but just adjust the velocity.
I have never heard of paint spraying out of the porting onto someone. Accuracy won't change whatsoever. A 1 inch barrel has the same accuracy as a 20 inch barrel. The shorter the louder.

UThomas · 10-21-2007, 12:42 PM

I think a 6" barrel shoots the same as a 20 inch - but there would be a noticeable difference with a 1" barrel.

fog · 10-21-2007, 12:54 PM

Me,on this barrel it has reverse porting closest to the marker,when i looked at reviews multiple peeps said it had sprayed paint on there mask

Surge-NS · 10-21-2007, 02:13 PM

It takes about 8" for the ball to accelerate completely to 280-300 range. Shortening the barrel beyond that means the ball is still accelerating as it leaves. This can sometimes cause the ball to take on a bit less of a regular arc, because it no longer has the barrel to keep the propellant gas behind it evenly. In a perfect world this would not matter, with a stationary barrel and a single shot. However, because of outside influences such as wind and the tendency to rapid fire while moving, thus creating puffs of propellant rapidly in a different direction than the first, it can negatively affect accuracy.

fog · 10-21-2007, 02:49 PM

this barrel is 4.5 to the 1st porting,so is this NOT a barrel to be bored for freaks ?

Schmitti · 10-21-2007, 03:56 PM

You need someone to tell you the length of a freak insert. That and you will need to bore from the front and then come up with a thread in/on keeper to keep the freak insert in the barrel

E

10-21-2007, 11:38 AM	#1 (permalink)
fog Active Member Join Date: May 2007 Location: MELB,FL	boring and shortening 8in sp venturi barrel Im considering having a barrel milled to accept freaks and cutting the barrel at the 1st port (closest to the marker)as ive heard if a ball breaks it sprays paint on ur mask any issues w/doing either? and a estimated price ?Also i think i know the answer but i was told (by a pb shop owner)that shortening the barrel will decrease distance an accuracy. Opinions please __________________ FOG = FAT OLD GUY http://www.automags.org/forums/showt...&highlight=FOG http://www.mcarterbrown.com/forums/f...-feedback.html

10-21-2007, 12:42 PM	#3 (permalink)
UThomas Rec Poster Join Date: Jul 2006 Location: Texas	I think a 6" barrel shoots the same as a 20 inch - but there would be a noticeable difference with a 1" barrel. __________________ Thomas Lots of automags and autocockers - esp Eclipse, Westwood, and Belsales http://home.roadrunner.com/~thomas_m...ollection.html http://www.youtube.com/user/Thomas4093 2 Stolen Splash Evolutions in Dallas: http://home.roadrunner.com/~thomas_mitchell/Stolen.html

10-21-2007, 12:54 PM	#4 (permalink)
fog Active Member Join Date: May 2007 Location: MELB,FL	Me,on this barrel it has reverse porting closest to the marker,when i looked at reviews multiple peeps said it had sprayed paint on there mask __________________ FOG = FAT OLD GUY http://www.automags.org/forums/showt...&highlight=FOG http://www.mcarterbrown.com/forums/f...-feedback.html

10-21-2007, 02:13 PM	#5 (permalink)
Surge-NS Devious Penguin Mod Join Date: Mar 2006 Location: Brookfield, IL	It takes about 8" for the ball to accelerate completely to 280-300 range. Shortening the barrel beyond that means the ball is still accelerating as it leaves. This can sometimes cause the ball to take on a bit less of a regular arc, because it no longer has the barrel to keep the propellant gas behind it evenly. In a perfect world this would not matter, with a stationary barrel and a single shot. However, because of outside influences such as wind and the tendency to rapid fire while moving, thus creating puffs of propellant rapidly in a different direction than the first, it can negatively affect accuracy. __________________ Now that's special. One case; One kill. What do you want, a cookie? [QFD] Do not, I repeat, DO NOT read any handgun magazines or any magazines related to guns. These rags thrive on making people feel outgunned and underarmed and if you read any of them, before long you will be trying to figure out how to conceal a .44 magnum under a t-shirt and shorts without ramming it up your ***. [/QFD] I am Scourge! Mod: Ask The Experts, Events, PBC Reviews, The Dead Zone

10-21-2007, 02:49 PM	#6 (permalink)
fog Active Member Join Date: May 2007 Location: MELB,FL	this barrel is 4.5 to the 1st porting,so is this NOT a barrel to be bored for freaks ? __________________ FOG = FAT OLD GUY http://www.automags.org/forums/showt...&highlight=FOG http://www.mcarterbrown.com/forums/f...-feedback.html

10-21-2007, 12:13 PM	#2 (permalink)
Mespllingesnogud Ignorant Child Join Date: Jun 2007 Location: USA	velocity could decrease by a small amount, but just adjust the velocity. I have never heard of paint spraying out of the porting onto someone. Accuracy won't change whatsoever. A 1 inch barrel has the same accuracy as a 20 inch barrel. The shorter the louder.

10-21-2007, 03:56 PM	#7 (permalink)
Schmitti Red=Moderator Join Date: Apr 2006 Location: Schen. NY	You need someone to tell you the length of a freak insert. That and you will need to bore from the front and then come up with a thread in/on keeper to keep the freak insert in the barrel E __________________ Gone fishing

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