Mk1 #5 bent barrel

[nd31male]

Well I handed it off and hoping for the best.

[browningautorifle]

It'll be fine.

[Lee Enfield]

Barrel straightening is a bit like straightening scaffold tubes. Not that I have ever strasightened a scaffold tube but I have straightened a barrel using the scaffold tube principle. Because of the safety implications, scaffold tubes can only be straightened by competent and authorised (?) people who have the right kit.

Identify the START of the bend. Identify the END of the bend - and mark. These are the 'anvil points'. Press at the centre of the area. Do NOT do ANYTHING outside this area because it ain't damaged there! MANY more pages and much more than that of course but that's a start

After it's straightened, I would stress relieve the barrel....

[browningautorifle]

stress relieve the barrel

What will that do? Reason I ask is I've done a number of barrels of different calibers and never (stress relieved) did more.

[Peter Laidler]

I was going to ask the same as BAR LE. Not the steel as it's only a tad more than good mild steel, thick walled tube and thinking at a bit of a tangent, it'll get pretty stressed every time it's fired..... JM and Breaky, you're the metallurgists. What do you both say?

[Lee Enfield]

I was going to ask the same as BAR LE. Not the steel as it's only a tad more than good mild steel, thick walled tube and thinking at a bit of a tangent, it'll get pretty stressed every time it's fired..... JM and Breaky, you're the metallurgists. What do you both say?

My local guys refer to significant walking zeros when a barrel has been straightened and not stress relieved afterwards.

Most to all of the custom barrel makers I know stress relieve their barrels in some way (I know of several different methods are used) after completing operations.

One fad from a few years ago was cryo (cold) treating barrels, new and old to reduce fouling, (allegedly) increase barrel life and mean accuracy, over "hot" stress relieving.

One local barrel maker "seasons" his material by storing it outside (in the weather) for at least 1 full seasonal cycle before he will deep hole drill or rifle the barrel. after boring he will heat stress relieve the barrel blank, then he cuts the rifling. This gentleman uses single point cut rifling and is extremely well known in the schutzen (and benchrest) circles.

I've also seen several custom barrels which were not stress relieved after manufacture which split (thankfully not during firing). I believe 2 of the barrels were from the same barrel maker (who retired @ 7 years ago) who has an good accuracy reputation. One of the 2 split during final contouring, and the other split at an unknown time from the muzzle (about 28") to the threads held captive in the receiver.

I'm not a metallurgist, but I do work in heat treating...

[browningautorifle]

Still, I'm thinking since it's a #5 and they don't have a stellar reputation for holding zero, and it's not exactly a match rifle...he can probably skip it...

[Vincent]

After it's straightened, I would stress relieve the barrel....

Can you give some basic DIY instructions on how to do that please?

[nd31male]

Yes I would be interested how this is done also I'm sure it will be a while before he gets it done. He's good but takes for ever.