Rechamber 6.5 Creedmore to .260 AI

[A A Ron]

According to the chamber prints the 6.5 Creedmore is .4709" at the widest point on the case body. The .260 AI is .4714" at the widest point on the case body.

Question, is .005" enough material to keep a reamer centered when rechambering a mass production 6.5 barrel to a .260 AI?

Would setting it back a few threads increase the margin if the factory tolerances are too sloppy?

 

[fseaman]

Would a long pilot shaft on the reamer help hold it?

 

[lancetkenyon]

Might as well do the .260AI. Go for more gain since you are thinking about it.

 

[buckbrush]

I have both 6.5 Creedmoor and 260 AI. Juice isn't worth the squeeze in my opinion.

 

[FEENIX]

According to the chamber prints the 6.5 Creedmore is .4709" at the widest point on the case body. The .260 AI is .4714" at the widest point on the case body.

Question, is .005" enough material to keep a reamer centered when rechambering a mass production 6.5 barrel to a .260 AI?

Would setting it back a few threads increase the margin if the factory tolerances are too sloppy?

What do you hope to gain from your investment of time and money? I agree with @buckbrush

 

[fseaman]

What pills are you throwing with the 6.5CM and how fast?

What do you want to throw and how fast?

 

[A A Ron]

It's actually more of an investment to go 6.5 Creedmore. I have hundreds of pieces of Remington and Lapua brass that feed my .260 and my .260 AI. I have dies for .260 AI.

I have nothing for Creedmore. I also have no desire to add another caliber to the stable.

Back to the point. Is .005" enough material to properly center the chamber reamer without slop or excessive runout?