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Is there any one in New Zealand, that does rebore on a barrel, and does anyone have an idea of cost.
Considering getting a K95 barrel rebored to .308 or .358 win.
Not enthused with the .243 barrel, and would like sum thing, that can be shorten and suppressed.
Have 6.5 & 5.6 Barrels, so can cover the .243 ground with them.
I am sure Hardy or truefligh are options, just not sure if they will another’s barrel.
If you have done so please pass on info.
You can only reborn an existing barrel with the cut rifling method
Not aware of anyone doing it in NZ
There are a number of businesses in the USA who do is and a very reasonable price
358 is a good option and seems too be a common option
35.com sort of says what you want too hear
Home - Reboring by J E S
I havecan artical in a book somewhere on reboring and it lists about 10 USA companies that do it.
If I can find it I will post the list.
From memory the only fly in the ointment was waiting times.
Some were only a month or two, others had a massive backlog
While there are barrel makers in NZ, they are all button rifle barrel makers
Rifling buttons can only go through a barrel blank that is virgin steel of a constant diameter
While a button could go through I pre existing profiled barrel it would give a bore that kept changing diameter due to the inconsistent steel thickness
Cut rifling an existing barrel is the only option
Spent some time with the boys from Oregunsmithing a few years back, pretty sure they were set up for cut rifling. Oregon is a lot closer to Bell Block than NZ, might be worth trying to get hold of them.
Well it should be cheaper.
Not paying for the barrel blank and already has a hole down it.
My understanding is that any existing caliber needs to be bored out first. This brings it back to a blank stock and then a button can be drawn through this. So a 243 barrel will need to be bored out to a new hole of say 249 & then rebore to a minimum 257. The grooves are usually 0.004 inch for a total caliber of 0.008 more than the original bore diameter. (For example 308 has a 300 bore & 7mm = 284 with a 276 bore.)
The late Din Collings once told me that a well used barrel would have a better molecular structure for reboring.
The theory behind that being all that rapid pressuring and releasing caused by firing will have tempered and distressed the barrel.
Nice ideaQuote:
Originally Posted by Nakihunter
But wrong
Yes the steel is stress relieved by thousands of shots
And yes you can put a button through and correctly sized piece of steel
But you can NOT put it through and existing profiled barrel and get a usable barrel
Buttons are not pulled through a bore diameter drilled barrel blank
They are made especially for being pulled through a certain fixed diameter of steel
The drilled and reamed hole they go through is slightly smaller than final bore diameter
This allows the button which is actually larger that the final bore and groove to be pulled through and the known diameter and known type of steel too spring back to final bore and groove
The variable spring back on an existing profiled, bored and reamed barrel means that pulling a button through it would give a significant variation in the final bore and groove sizes.
The muzzle which is usually the thinnest section of the barrel would be bell mouthed, because it is thinnest there is less metal too spring it back.
Pull it through backwards then - problem solved!Quote:
Originally Posted by akaroa1
Look for solutions, not problems.
Might be sarcasm, might not....
I believe that's called Pushing.Quote:
Originally Posted by Ross Nolan
Potato, potatoe, semantics.Quote:
Originally Posted by whanahuia
I believe JES are the go to, but I don't know how easy it would be to do the trans border thing with gun parts.
Same differenceQuote:
Originally Posted by Ross Nolan
Won't work
Most barrel blank makers pull the buttons
Some push
Tony Hawkins machine had an ingenious pusher for his buttons
Some home tinkerers push buttons with a massive hydraulic ram
It can work to make a sort of serviceable pistol barrel
Most likely will turn to shit with a long rifle barrel
The amateur on line ones I've seen were just relying on the in built twist on the button to get their twist rate.
The professional buttoned barrel makers have a sine bar controlling the twist as well and can often speed up or slow down the twist a few inches either way.
Depending on the grind of the specific button
Oh I do wish this wasn't so as a SMLE would be ideal candidate for 444 marlin or .45/70.44/40,44magnum single shot magless rifle... But I trust @akaroa1 to know best.
Is a barrel liner glued into a bored barrel an alternate way that would work?
Glued liners can work with low pressure calibers - 22LR being the most common. Often it's simply not feasible with higher pressure rounds and the available material (wall thickness) left in the parent barrel. I know of several people that did this with stuffed LE barrels converting them to 22LR trainers. Effectively it's just an extended 8mm drill bit with a pilot ground into the nose of the drill in a lathe so the drill doesn't bit one side and wander off, and then a chamber insert to be made up. Glue the insert to the liner, then glue the assembly into the barrel.
Hardest part now is getting a suitable liner, I got two off MAB when they were still in business in Aussie - no idea where you'd get one now!
As far as the buttons, it's easier to pull them as they self-align to a certain extent. Pushing can give you issues with the button tipping and all sorts of other gremlins popping in for a visit. The main risk with pulling is the forces being high enough to shear the button off the pulling system.
Same effect as cutting a muzzle thread on a stressed barrel - reducing the diameter allows the metal in the muzzle to expand giving a bell mouth effect.Quote:
Originally Posted by akaroa1
Trueflight did a 358 barrel and fitted it for me some 5 years back.
I just took the 308 one off and has a new S/S 358 Win one fitted. Sav 99.
If you are still in the North America it may well be cheaper if someone is set up to drill and cut your exisiting one.
However an email to TF would give you an idea of what a new barrel would cost and it will shoot well.
Z
Thanks for the info guys, I will pursue options, Here in Alberta, I have one lead for rebore, time being the biggest problem, moving mid 2025.
It doesn’t look like rebore, is possible in NZ, but it may be possible, to make a barrel stub, from existing barrel and rebarrel.
Might just be cheaper to sell the barrel and buy a new one, if you can get it in time before you leave.