M700 rebore: .308 to???

[Kraschenbirn]

I've got a my old M700 match rifle sitting in the safe with a few thousand rounds down the tube. Still shoots CBs pretty well but no longer the 'tack driver' it once was with SMKs. Started out thinking, maybe, a rebarrel to 7-08 or .284 Win but, lately, been considering a rebore...there's plenty of metal to work with, the existing barrel is a 24" McGowan #7 Medium Target (straight taper, .875 muzzle).

Now, the way I see it, I've only two (realistic) options for the rebore: .338-08 (.338 Federal) or .358 Win. Anyone have experience with either...or both? When finished, rifle will probably never see a jacketed round in my lifetime and be used almost exclusively on paper and steel targets out to 300M or so.

Any and all suggestions and/or advice appreciated.

Bill

[Texas by God]

I'll be first to say .358 Win but I won't be the last. JES reboring will hook you up.

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[zymguy]

Im enjoying 358 win with the 358429 and 700x

[hithard]

I'm very happy with my 338 fed.. Pac nor did the work. Cast wise it once pushed through two pigs of about 130lbs. With RD 210gr. At a 1600fps.

[dverna]

A lot more bullet choices in.358

[Uncle Grinch]

No question as far as I’m concerned, 358 Win gives you more flexibility and more choices.

[Reverend Al]

Same story here. I had Ron Smith out in Alberta re-bore a 600 Remington from .308 to .358 Winchester for me and I absolutely love it. Lots of great already in production mould choices in .35 calibre ...

https://i.imgur.com/1irIh0k.jpg

[MT Chambers]

Cut out existing chamber and rechamber to the most accurate .30 cal. cartridge, the .30 Br.

[Kraschenbirn]

Dunno if that would work. Chamber cast (cerrosafe) shows a lot of throat erosion and there's considerable wear on lands...like barrel slugs almost .309 x .3015. Would have to cut almost 1.5 inch off the breech end and rethread before rechambering and, then, would still have a well-worn bore.

I agree, though, the .30BR is tempting. I've owned/shot XP-100s in both 6BR and 7BR and often considered rebarreling a Ruger #3 that lives in the back of the safe...right beside that old M700...to a Rem 'BR' cartridge.

Bill

[MT Chambers]

Bill: The BR is the winningest cartridge in Cast bullet BR. comp. also a winner for shooting jkt. br. for score. It would also make a great lightweight hunting round.