Help ID Chambering

[nashlaw]

I have a Remington 700 that has been chambered in 6.5-something-or-another. The workmanship is excellent (crown,finish,bolt lugs), but meither my smith nor I can decide what the chambering is.

It is a short action with a .473 boltface. My smith did a cast and we both looked at it and thought it was a 6.5x47. I ordered go/no go gauges in that chambering and it was not that. I have 6.5 Creedmoor ammo and brass and it does not get close to fitting.

I would appreciate your input and van provide more info if it will help.

Thank you,

David

 

[ELR LVR]

Need more info,
Was the 6.5 Creed go gauge, too long, too short, too fat ?
I'm sure you know you could do a chamber cast right? Short of that I'd simply rechamber it.
There were some older 6.5 Miltary chamberings similar to .260 (6.5 Arisaka,6.5 Jap etc)
such as 6.5x51 - 6.5x52, 6.5x53 6.5x 55 etc etc
If you have it at your smith, I would just have him set it back and rechamber to something more common
---
I ran into a Steyr 1900 and found the same thing, it was a 6.5 something with a 9 twist barrel
could not ID the chamber and with so many different older 6.5 chamberings possible I did want to fool with it, let alone try to have to track down such brass or form it so....
I simply rechambered it to a .260 Rem so I KNEW what it was and made it easy to load for.
it was an iron sight gun and after the rechamber was a low recoiling tack driver within 100 yds.
---
260 AI or a 6.5x55 AI would be sweet for ya

 

[swd]

The only real way to know is to do a chamber cast with Cerosafe. And it's easy to use..

 

[243winxb]

260 remington ? To long?