SX3 Barrel Bulge Question

A shotgun forum for basic gun smithing, repair, modifications, and all other detailed shotgun information.

Moderators: waterfowlhunter, don taylor

SX3 Barrel Bulge Question

Postby stillbuster » Sun Dec 22, 2013 11:45 am

I recently acquired a SX3 Field 3" 28" barrel used from a guy in a trade.

My question is this:
When in shoulder the gun and then tilt it left or right I can see a noticeable "size" difference in the barrel. This size difference starts where the back of the choke begins running to the exit end of the barrel.
This very slight but noticeable difference in the barrel circumference is uniform.
There is no noticeable deformation or separation of the vent rib in this section.

Are ALL SX3 barrels slightly larger in the choke section of the barrel OR did the previous owner "over choke" when he shot it?

When you shoulder your SX3 is the barrel smooth and contiguous from back to front or does it show a slight step where the choke begins?

I can't find one at a store locally to compare it to.
So in advance thanks for your input.
stillbuster
hunter
 
Posts: 6
Joined: Sat Jan 22, 2011 11:36 pm


Re: SX3 Barrel Bulge Question

Postby clampdaddy » Sun Dec 22, 2013 12:11 pm

That's normal. My Browning Silver is the same way. It's a way to save weight. They use a lite contour barrel and then expand the muzzle area to help accommodate the choke tube. It looks funny but it sure makes them nice to carry.
User avatar
clampdaddy
hunter
 
Posts: 3356
Joined: Tue May 24, 2011 9:23 pm
Location: Where spoonies go to die

Re: SX3 Barrel Bulge Question

Postby stillbuster » Sun Dec 22, 2013 1:35 pm

Thanks for the reply.
It had me worried, the gun is 99% cond. with the exception of the barrel concern you alleviated.
stillbuster
hunter
 
Posts: 6
Joined: Sat Jan 22, 2011 11:36 pm

Re: SX3 Barrel Bulge Question

Postby waterfowlhunter » Mon Dec 23, 2013 3:29 pm

Some say it is to save weight, I was told by a manufacturer, browning I believe, that it is done so that they have enough material to machine out for the choke tube and if they did not do this the walls of the choke would be to thin to be safe. Either way it is normal on most if not all shotguns with chokes, I just checked my Benellis, Brownings and Remingtons along with a W&S and an Escort and they all have a flared muzzle. the funny one is the SP-10 that I just acquired which is reverse. The barrel is larger all the way to the choke then the outer dia gets smaller by .08 thru the choke area. If I remember right Mossy 935 and 835 really flare out.
"A free people ought to be armed" George Washington 1790

‘For those who would give up essential liberty to purchase a little temporary safety, deserve neither Liberty nor safety.’ —Ben Franklin.”
User avatar
waterfowlhunter
Forum & State Moderator
 
Posts: 3682
Joined: Thu Oct 14, 2004 4:53 am
Location: Linden, MI

Re: SX3 Barrel Bulge Question

Postby clampdaddy » Mon Dec 23, 2013 5:57 pm

waterfowlhunter wrote:Some say it is to save weight, I was told by a manufacturer, browning I believe, that it is done so that they have enough material to machine out for the choke tube and if they did not do this the walls of the choke would be to thin to be safe. Either way it is normal on most if not all shotguns with chokes, I just checked my Benellis, Brownings and Remingtons along with a W&S and an Escort and they all have a flared muzzle. the funny one is the SP-10 that I just acquired which is reverse. The barrel is larger all the way to the choke then the outer dia gets smaller by .08 thru the choke area. If I remember right Mossy 935 and 835 really flare out.


Yeah, it's all going to depend on the wall thickness, barrel diameter and the outside diameter of the choke tube. My BPS has a standard weight barrel so it didn't need to be expanded much (if any) in order to leave enough meat for the choke tube.
If they did, its not visible to the naked eye. That barrel is like a lead pipe compared to the barrel on my Silver. It will never see a pheasant hunt. :lol3:

A while back I took some measurements on my Silver and found that six or seven inches before the muzzle bulge, the outside diameter of the choke tube is actually larger than the outside diameter of the barrel. Go figure. :huh:
User avatar
clampdaddy
hunter
 
Posts: 3356
Joined: Tue May 24, 2011 9:23 pm
Location: Where spoonies go to die


Return to Shotgun Repair & Modifications Forum

Who is online

Users browsing this forum: Tim Terrell and 5 guests