I have a CZ550 in 270 that I have been considering having rebored/rechambered to 9.3x62. Initially I was planning a rebarrel, but after speaking with Dan Pedersen the rebore idea came alive. Anyone have any comments, pros, cons on a lightweight 9.3? For those of you who like numbers:

muzzle diam 0.610"
bore diam 0.357"
difference 0.253"

Thanks!

Since the cost of a rebore is about 70% of the cost of a new CZ in 9.3x62. Why not buy a second rifle or sell the first and buy new putting some $$ back in you pocket?

I agree with ramrod340. CZ barrels are superb, and a rebore will almost certainly be inferior. Also, in 9.3x62 the 550 comes with a 1" Decelerator and dual crossbolts, both of which you'll want and which add significantly to the conversion cost.


Okie John

I would like a lightweight 9.3 too but I would trade a 270 that I did not want and buy a 9.3. It costs less, you get quick delivery and the chances of something going wrong are way less.

I see the math as .610-.366/2=.122" wall thickness considering that the groove diameter rules.

I have some .358 Win Featherweights and they are .560-.358/2=.101" and they have held up for many decades.

CZ makes a cute full stock in 9.3 but they seem heavy on paper. I would like to handle one however.

Okie:
Why would a cut rifled re-bore be inferior??

If it were me...I'd trade rifles as it just less costly to do it that way.

It's about $260 to have the barrel rebored by Jim Dubell. CZ's in my neck of the woods are selling for over $600 for the "common" calibers. By my calculations that's less than half the cost of a new rifle.

Well all I can say is your quote is lower than mine. I just got a quoted from Jim Dubell last week to take a 30-06 M70 to 9.3. His price until the end of the year was ""The complete project runs $325 thru the end of the year (and return shipping/ins) or we can just rebore if you have someone to do the chamber/crown work...that runs $135"" Maybe the M70 cost more.

I was at the gunshop yesterday. He said he would order me a 9.3X62 for $459.

So based on the numbers I had 325/459 = 70.8%.

Fair enough, when I last talked to him the quote was less but that was much earlier this year and for a Mauser. If I could get a CZ550 for your price, I would! Sadly, around here they run closer to $650.

quote:

I was at the gunshop yesterday. He said he would order me a 9.3X62 for $459.

So based on the numbers I had 325/459 = 70.8%.

I see the M70 30-06 being worth say $350 so 459-350= $149 to get a new CZ 9.3.

quote:

459-350= $149 to get a new CZ 9.3.

More like $109. That is why I decided to not rebore and just buy new.

Z1r Here in Houston they are $600 on the big stores shelf. I go to a small guy that doesn't stock them. I pay up front. He orders, he is not out any money Charges me $20 or so to log it in.

Out here, that same transaction would cost me closer to $100. And that assumes they can get it for the same price from their supplier.

Unless I had an emotional attachment or a distinct preference for the used gun I would buy a new CZ at those prices. I'd say you got a gem of a dealer there. Send him a Christmas card fer sure!

I have a nice guild Mauser with full length rib in 8mm that I'd like to rebore to 9.3x62. Why do you say the rebores are inferior, are stresses introduced?

Anyone have a contact # for Dubell? I tried 509 684 5855 but all I got was an automated message saying no messages were being taken. Anyone else do good rebores?


Thanks, Rob

I think your case is the perfect time for a rebore. But, if the barrel is just a plain barrel no rib or some other reason to keep it then just start over.

I think a rebore can be as good as the original. I don't know if it is often better.

Dubell is at:
http://www.deltagunshop.com/

A different rifle is not an option as I have a custom piece of bastogne on it now. I will stay out of the argument regarding whether groove or bore diameter is used for determining barrel wall thickness. Danny Pedersen said .357" and that's the number I posted above. Has anyone experience with a light 9.3? FWIW, rebore and rechamber is $265.

I'd still buy a second rifle and just swap the stocks. LOL Guess that is why I need a bigger safe.

Sounds like you have your bases covered. I had emailed Danny and never heard back from him. Please post your results.

quote:

Originally posted by ACRecurve:
A different rifle is not an option as I have a custom piece of bastogne on it now. I will stay out of the argument regarding whether groove or bore diameter is used for determining barrel wall thickness. Danny Pedersen said .357" and that's the number I posted above. Has anyone experience with a light 9.3? FWIW, rebore and rechamber is $265.

I have a 9.3 that weighs about 7.5 lbs with a hard plastic but plate. I rate the recoil easily as tolerable as a full-house 180 gr 30-06.

I'm sending Perdersen an 8MM guild gun with rib also. This one should come in around 6.75 -7 lbs and I think it will be fine in the recoil dept.

ramrod340,

I'll be happy to post my results when I get them. I'm not in a hurry so Danny is gonna call when he has a few he can batch together. In the past I would have just bought one...I'm actually committing the sin of paring my hunting rifles down to 7x57, 9.3x62, 404 Jeff. I've "wasted" enough $$ on rifles to have paid for one very nice safari and don't intend to repeat that mistake. Now if I could only dampen my enthusiasm for custom sxs shotguns!

tiggertate,

Thanks. That's the sort of info I was looking for. I may exchange the Neidner for a Decelerator, though!

quote:

Originally posted by ACRecurve:
A different rifle is not an option as I have a custom piece of bastogne on it now. I will stay out of the argument regarding whether groove or bore diameter is used for determining barrel wall thickness. Danny Pedersen said .357" and that's the number I posted above. Has anyone experience with a light 9.3? FWIW, rebore and rechamber is $265.

Is Danny pederson also a reborer? If so do you have conact info?


Thanks, Rob

quote:

Danny pederson

Yep he rebores
http://www.cutrifle.com/

quote:

Has anyone experience with a light 9.3? FWIW, rebore and rechamber is $265.

Mine is on a Winchester Model 54 action with original stock and a 26 inch Lothar Walther barrel. Not super light but fairly trim and no issues shooting it in the field.

There are several issues with rebores that do need discussion. The stress of reboring and rifleing the tube is one issue. The fact that the cuts near the crown will never be as clean and free from defect as a tube that has been bored/cut rifled/ and lapped and then the barrel trimmed and a proper crown done. One of the aspects least appreciated is the condition of the crown and its ultimate effects on accuracy. This alone would prevent me from doing a rebore. I think if you are considering a new caliber, looking at the least costly option may not be the best option. IMHO

From the information we have been able to gather the cut rifling process does not set up stresses in a barrel as will a button rifling procedure. The $325 cost of a rebore/rechamber job includes lathe-cutting a new crown and the caliber re-mark. I'm guessing the same will hold true with Danny. The above statement about the effect on the muzzle is absolutely true, especially since our rebores go through two seperate lapping procedures. You will need to remove 1/16th to 1/8th off the end of the bore. This does not however require shortening the barrel that much, depending on the type of crown being cut.

Jim

You will not go wrong having Danny rebore your barrel. He has a lot of excellent experience and you won't get a better job from anyone I'm aware of.

After visiting cutrifle.com, I don't think they rebore for a 9.3X62.

markino,

Danny told me his reamer list on the website needs 2B updated and that he does 9.3x62, 9.3x64, and 9.3x74R.

Jim_Dubell,

Thanks for your input!

quote:

Originally posted by lb404:
There are several issues with rebores that do need discussion. The stress of reboring and rifleing the tube is one issue. The fact that the cuts near the crown will never be as clean and free from defect as a tube that has been bored/cut rifled/ and lapped and then the barrel trimmed and a proper crown done. One of the aspects least appreciated is the condition of the crown and its ultimate effects on accuracy. This alone would prevent me from doing a rebore. I think if you are considering a new caliber, looking at the least costly option may not be the best option. IMHO

I would repectfully disagree about induced stresses. In fact, originally Kreiger rifled their service rifle barrels after final contouring and after the second cryo because external contouring produces far more stress and should be relived before the bore takes its final shape. The muzzle issue is correct, though. I've had a reasonable amount of experience with Cliff LaBounty before Jim took over and as a client I can say with some certainty that rebored barrels do not shoot any worse and usually much better than the original caliber. There is even an argument out there that relieving the ID reduces pre-existing stresses through the metal loss. Maybe our resident metalurgists can flail that one around a bit.

ACRecurve - Thanks for the good news. I may have my brother send my rifle out to him so that he can convert it to a 9.3X62.

How much would it cost to convert a Remington 700 ADL chambered for a .30-06 into a 9.3X62?

markino,

$265 to $325 USD seems to be the going rate range here...maybe someone from Italy has better info for you. You will need at least 0.125" barrel wall thickness at the muzzle after the rebore.

The thing is that I left the rifle in the States and therefore it would be cheaper to have the work done there.

ACRecurve - Thanks for all the info.

I have a lightweight 9.3x62, a restocked Husky. Recoil is very light and the gun is a pleasure to shoot -since the stock is made to fit me felt recoil is less than on the Sako 75 in 30-06 that I once owned.

quote:

Originally posted by ACRecurve:
markino,

You will need at least 0.125" barrel wall thickness at the muzzle after the rebore.

How do you conclude this? If you look at a typical Rem 700 sporter barrel with front sight, the wall thickness measured at the the sight screw hole is less; closer to .100".

Here's a question. My 8mm guild gun has a 2 leaf express sight. Assuming I rebore to 9.3x62, how do the ballistics of the two different cartridges compare? Will I need to file the rear sights down or the get a higher front sight?

TTT