S |
M |
T |
W |
T |
F |
S |
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
|
|
0 members (),
467
guests, and
3
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
Forums10
Topics38,499
Posts545,462
Members14,414
|
Most Online1,344 Apr 29th, 2024
|
|
|
Joined: Jul 2009
Posts: 196
Sidelock
|
OP
Sidelock
Joined: Jul 2009
Posts: 196 |
Has anyone any experience of "jug" choking or recess choking whereby a cylinder barrel has a slight recess formed in the bore approximately one inch behind the muzzle; recess then causes the shot to gather before leaving the muzzle resulting in a denser pattern - effectively "giving back" choke to a gun without it?
The only reason I ask is that most pre 1875 doubles seem to have no choke and whilst this is practically little issue for shots 35 yrds and below, it can be restrictive outside of that - especially on wildfowling/waterfowling bigger bore guns. I am NOT advocating crazy long range shooting here at all - but simply that on occasion, having some element of choke can be beneficial.
Interested to hear opinion, especially whether anyone has ever seen this done on Damascus barrels (assuming plenty of barrel thickness to work with)?
|
|
|
|
Joined: Dec 2001
Posts: 6,994 Likes: 402
Sidelock
|
Sidelock
Joined: Dec 2001
Posts: 6,994 Likes: 402 |
I had this done to a set of damascus barrels I once owned. Nick Makinson did the work and it seemed to pattern well and kill Roosters nicely. He was limited as to the amount of choke he could add with this method, if memory serves, on this set of barrels he was able to add .012" or light mod chocking.
|
|
|
|
Joined: Feb 2003
Posts: 4,038 Likes: 48
Sidelock
|
Sidelock
Joined: Feb 2003
Posts: 4,038 Likes: 48 |
Never had experience with other than fluid steel barrels, but I can vouch that jug choking works well.
My best skeet barrel is a cut off full choke barrel jugged about .006". Very even pattern.
"The price of good shotgunnery is constant practice" - Fred Kimble
|
|
|
|
Joined: Aug 2004
Posts: 72
Sidelock
|
Sidelock
Joined: Aug 2004
Posts: 72 |
CBL1 I just had this done and am very pleased, I shoot sporting clays and the best I could do on my home course before was 72 after haveing it done I shot 86 and 88. I had .015 jug put in both barrels that measure .735 bore size. The plan was to pattern it after I had it done to compare to the pattern sheets I did before but we have 14 inches of snow so it will have to wait. Mike Orlen did the work by the way. Hope this helps. Mike
|
|
|
|
Joined: May 2004
Posts: 2,092 Likes: 13
Sidelock
|
Sidelock
Joined: May 2004
Posts: 2,092 Likes: 13 |
The amount of jug choking can depend on the thickness of the barrels in that area. If you 35 thousandths in thickness you cannot remove 20 thousandths for a modified choke because your wall thickness at that point will be too thin.
So many guns, so little time!
|
|
|
|
Joined: Dec 2001
Posts: 6,994 Likes: 402
Sidelock
|
Sidelock
Joined: Dec 2001
Posts: 6,994 Likes: 402 |
I agree, but .020" of constriction is only .010" per wall
|
|
|
|
Joined: Dec 2001
Posts: 3,964 Likes: 89
Sidelock
|
Sidelock
Joined: Dec 2001
Posts: 3,964 Likes: 89 |
I shoot a 1870 Scott with both damascus barrels jug choked to .006. It is my favorite dove gun and commonly nails birds well over 30 yards--and they're small targets. Neatly done I see no reason not to do it as long as wall thickness is sufficient.
When an old man dies a library burns to the ground. (Old African proverb)
|
|
|
|
Joined: Jan 2002
Posts: 5,983
Sidelock
|
Sidelock
Joined: Jan 2002
Posts: 5,983 |
My one experience was with a Citori .410 skeet gun, one of the first to come to the LA area. It was Cyl/cyl and lousy. Would not keep all the shot on a 48" x48" paper @ 20 yards. Purbaugh jugged it to about the equivalent of .410 modified and it was a much improved skeet killer. My only anoyance was that plastic would build up in the recess and needed to be frequently cleaned. It definitely does work! It's my belief that it's a very effective thing to do to a muzzle loader because they still load like a cylinder barrel, but can then give a tighter pattern, for longer shots.
> Jim Legg <
|
|
|
|
Joined: Jul 2009
Posts: 196
Sidelock
|
OP
Sidelock
Joined: Jul 2009
Posts: 196 |
On my hammer Reilly, I doubt this will be an option as the barrels are no more than 28 thou at any point.
However, on another of my guns, thickness is > 50 thou, which would indicate I could have a chance. Forgive the UK terminology, but if the barrels on this gun are currently improved cyclinder (I think US skeet or 0.005), could I feasibly go up to modified/half choke (0.020) or is the improvement limited to a smaller degree? Bonehills post just above this would indicate it is possible.
|
|
|
|
Joined: Oct 2008
Posts: 190
Sidelock
|
Sidelock
Joined: Oct 2008
Posts: 190 |
Jug choking can work very well, assuming that the barrels in question have sufficient wall thickness to accomodate them. It is an old technique but a good one.
Three things might be considered, however:
First, recess chokes do not always perform their best with loads that use plasic wads. I suspect that at least some these wads do not always allow shot charges to "spread" inside the "jug" sufficiently to allow the constriction in the "choke" to do its job optimally. At least, that has been my experience.
Next, FWIW, "jugged" chokes do not usually lend themselves to optimal accuracy using solid projectiles. Accuracy can be pretty "cattywumpus" after barrels are jug choked.
Finally, even after barrels are "jugged" the shooter is still limited to just one choke per barrel. If this is a potential problem, the installation of a set of Briley "Thin Wall" choke tubes might be a desirable option.
|
|
|
|
|