|
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
|
|
|
|
|
|
|
Forums10
Topics38,934
Posts550,868
Members14,460
|
Most Online1,344 Apr 29th, 2024
|
|
|
Joined: Feb 2002
Posts: 2,859
Sidelock
|
Sidelock
Joined: Feb 2002
Posts: 2,859 |
If one's needed, I have a micrometer with a round anvil for measuring tubing wall thickness. Steve
Approach life like you do a yellow light - RUN IT! (Gail T.)
|
|
|
|
Joined: Apr 2011
Posts: 714 Likes: 9
Sidelock
|
Sidelock
Joined: Apr 2011
Posts: 714 Likes: 9 |
So how thin were the walls at the burst? 5/1000th or 50/1000ths? If we are talking the last third of the muzzle end of the barrel 21/1000th is plenty for me. If we are talking a 1/2" from the muzzle end of the chamber it is not. Does the story that goes with that picture give any theories of the failure? Sorry, I wasn't trying to draw inferences between the pictured incident and the OP's question. Just wanted to show the seriousness of a failure. CHAZ
Last edited by Hoof; 01/28/13 07:44 PM.
|
|
|
|
Joined: Jul 2005
Posts: 7,065
Sidelock
|
Sidelock
Joined: Jul 2005
Posts: 7,065 |
Don't fool yourself about thin walls being OK at the muzzle end of choked guns. Here's a set of Krupp steel barrels on a graded Fox that were struck to remove surface corrosion before rebluing. They seemed fine until about 100 shots were fired through each tube..... 1 ounce lower pressure lead loads on a sporting course. One pic is worth a 1000 words; that's a bulge, gents. Choke wall is .018" thick where shown by the arrow. Both tubes measure about the same in that area and both have bulges. Silvers A few years ago I was talking to a friend who had recently bought a Birmy Boxlock. The first time he shot a box a shells through it a bulge appeared just ahead of the choke. He sent it off to his favored gunsmith and had the dent taken out. Next time he shot it the same bulge reappeared.
I am glad to be here.
|
|
|
|
Joined: Feb 2004
Posts: 13,880 Likes: 16
Sidelock
|
Sidelock
Joined: Feb 2004
Posts: 13,880 Likes: 16 |
I can't recall exactly what the product was, but I recall a process where an irregular profile was machined on the o.d. of a tube and the i.d. was a straight hole. The part was then swaged into a die that made the o.d. straight. The i.d. that resulted had the irregular shape as though it was machined. I think it was a rocket motor case or something like that.
My thought was that this bulge in Frank's gun is the imprint of the inside profile where the payload swaged the barrel out.
|
|
|
|
|
|