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rechambering question

skyfish
There is a rifle that was a 243 re-chambered to 260 rem and rebored. It is a Weatherby Vanguard, VGL with 20" barrel. Do you have to be concerned about the barrel being to thin.

I'm looking for a inexpensive rifle for my kids and can't find a 250 savage, 257 Roberts or 260 rem in a Savage Accustock or a Howa. Its for my 2 boys for a general purpose rifle.
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Comments

8 comments

Date Votes
  • skyfish
    Looking for an opinion or two from gunsmiths on what would be involved in rechambering a .270 to .257 Roberts. Would anything be necessary beyond rechambering/rebarreling and maybe filling the magazine? In these days of political correctness is this called a caliber reassignment?
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  • Hawk Carse
    I doubt it.
    Can you testfire it before you buy?
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  • ern98
    You don't probably have any problem with it, probably. The thing with current manufacturing processes is that they pick a barrel contour that is, for the most part, a one size fits all. So off hand I would expect that 243 contour is the same that they use up to 30cal. To check this I would measure the barrel length and muzzle diameter and then email someone selling/auctioning off a .308win Howa or Vanguard and ask for the same dimensions. If they match then your rebored 260 ought have no problems at all, I expect. Also I'd ask for the muzzle wall thickness and if it is not at least .1" thick, and preferable .15" then I would pass on it......
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  • tsr1965
    If you use the actual bullet diameter as a guage 0.243" vs. 0.264", you are talking a total of 0.021", or 0.0105" per side. That is nothing to be concerned about. However, I would want to test it before I purchased it to see if it is a good shooter or not. If it is a good shooter, then you have a great rifle for your sons. Even better than the 250-3000 or 257 Bob you mentioned.

    Best
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  • nononsense
    skyfish,

    The rule of thumb used by the cut rifle barrel makers for reboring is to subtract the bullet diameter from the O.D. of the muzzle diameter and divide that by two which gives you the thickness of the side of the barrel at that point. The minimum thickness is usually between 0.125" and 0.150" per side.

    Most of these commercial barrels are 0.625" diameter at the muzzle, so subtract 0.264" and you get 0.361", divide by 2 and you have 0.1805" per side.

    .625 - .264 = .361 / 2 = .1805"/side

    I think that the bigger drawback is going to be the noise from a short barrel for younger (or older) ears.

    Best.
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  • He Dog
    I am with nononsense, a 20" barrel is going to be a blaster. I re-barreled a .243 to .260 but went with a 24" barrel. It is certainly more of a thumper than my .257 Bob, which is on a laminate stock.
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  • Old hickory
    OK with any rebarrel/rebore you gotta ask "why did the guy go to all the expense to do that and then get rid of it?" AND "who did the work?" was he really good or sort of competent? The price better be cheap because you have a cut barrel, reworked chamber, and meanie caliber. I'm old fashioned and like a .243 just fine.
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  • Mobuck
    I've got agree with the last post. Maybe the rifle turned out to be a problem child and now it's for sale to cover the loss.
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