The Firing Line Forums

Go Back   The Firing Line Forums > The Hide > The Dave McCracken Memorial Shotgun Forum

Reply
 
Thread Tools Search this Thread
Old June 7, 2012, 10:43 AM   #1
rhinonewshooter
Member
 
Join Date: June 15, 2011
Posts: 95
O/U chokes - which one on top?

Does it matter where you put the tighter choke on your O/U?

I usually have sk/sk, so it doesn't matter. Shooting sporting clays and have an IC and IM choke. right now I have the IM on top, for no particular reason. But it raised the question in my mind - is there a rule of thumb, and if so, what is it.

My thought, again for no particular reason, is that in the various presentaitons, the first shot will likely be closer, and I would start with the lower barrel.

But I'm new to O/U, so was wondering if top/bottom choke selections had a particular rhyme and reason.
rhinonewshooter is offline  
Old June 7, 2012, 12:29 PM   #2
BigJimP
Senior Member
 
Join Date: February 23, 2005
Posts: 13,195
Typically you want to fire the lower barrel first...( its more in line - with the center line of the gun ) ...less muzzle jump, etc...

.....so if I want 2 different chokes in the gun / I will put the more open choke in the lower barrel and the tighter one in the upper barrel.
BigJimP is offline  
Old June 7, 2012, 12:33 PM   #3
PawPaw
Senior Member
 
Join Date: December 24, 2010
Location: Central Louisiana
Posts: 3,137
Generally, if I remember correctly, O/U have the open barrel on the bottom, while S/S shotguns have the open barrel on the right.

However, with the newfangled invention of screw-in chokes, you can have it to suit your particular fancy. Enjoy!
__________________
Dennis Dezendorf

http://pawpawshouse.blogspot.com
PawPaw is offline  
Old June 7, 2012, 12:43 PM   #4
Creek Henry
Senior Member
 
Join Date: October 23, 2009
Location: Dallas
Posts: 514
I always used to shoot U first, but I find it so much easier to reload O that I shoot the top first. With moderate recoiling loads, it doesn't matter much. Also, in the field where I might only shoot once (and reload one barrel, O is faster). If I know I'll shoot both (like for clays), it doesn't matter.
Creek Henry is offline  
Old June 7, 2012, 01:00 PM   #5
oneounceload
Junior member
 
Join Date: April 18, 2008
Location: N. Central Florida
Posts: 8,518
I start with the open in the bottom and the tighter choke in the top. However, if I get to a station in sporting clays where I am only changing the open choke for one even tighter than the top barrel, it doesn't really matter.

SUPPOSEDLY, the bottom barrel is more in line for recoil and with the mass of the heavier barrel on top flips upward less. Whether there is any truth to that or if one can even tell, I couldn't tell you.

I do know that the high-end fixed choke pigeon guns all have the more open of the two chokes in the bottom barrel
oneounceload is offline  
Old June 7, 2012, 01:11 PM   #6
zippy13
Senior Member
 
Join Date: August 23, 2008
Location: SoCal
Posts: 6,442
The geometry of an O/U gives the lower barrel less eccentricity about the neutral axis, so it will tend to rise less under recoil. Because of that, most folks shoot the lower barrel first and typically have the more constricted choke in the top barrel. That being said, there are exceptions: My trap combo is locked to shoot the upper barrel first because that is the barrel used when the single barrel is put in the same action.
zippy13 is offline  
Old June 7, 2012, 01:15 PM   #7
.300 Weatherby Mag
Senior Member
 
Join Date: September 6, 2008
Posts: 1,777
Quote:
SUPPOSEDLY, the bottom barrel is more in line for recoil and with the mass of the heavier barrel on top flips upward less. Whether there is any truth to that or if one can even tell, I couldn't tell you.
Its obvious in my 682 that the recoil is inline with the bottom barrel.. It become readily apparent when trying to shoot a double with the top barrel first..
.300 Weatherby Mag is offline  
Old June 7, 2012, 01:35 PM   #8
zippy13
Senior Member
 
Join Date: August 23, 2008
Location: SoCal
Posts: 6,442
Quote:
Whether there is any truth to that or if one can even tell, I couldn't tell you.
You can't deny the physics, but...
I shoot Skeet doubles with the lower barrel first and Trap doubles with the top barrel first. The Skeet gun is a little heavier and the trap gun a little longer and, as my friend 1-oz speculated, I don't notice any difference. Perhaps if I were shooting boomer duck loads, I'd notice a difference.
zippy13 is offline  
Old June 8, 2012, 01:56 AM   #9
olddrum1
Senior Member
 
Join Date: March 23, 2008
Location: Mid Missouri
Posts: 807
Winchester made a 101 that was used in live bird shoots. Kind of gun of choice. It had screw in chokes for the lower and fixed full for the upper barrel. Used the more open choke for the close shot and then if the bird did not fall you had the full choke barrel for the second shot. Helps to know if the target is coming in or going out.
olddrum1 is offline  
Old June 8, 2012, 10:40 AM   #10
rhinonewshooter
Member
 
Join Date: June 15, 2011
Posts: 95
Ironically I am shooting a Winchester 101 - but it came from the factory with full/full set chokes. Prior owner sent it to Briley, and had them tap out for the thin walled chokes - and had it set up for a set of their tubes, all with removable chokes. I'll be using the 20 ga tubes tomorrow
rhinonewshooter is offline  
Reply

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

Forum Jump


All times are GMT -5. The time now is 09:42 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2021 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Page generated in 0.06983 seconds with 10 queries