6.5/257 Roberts AI ?

[captpete]

I recently ordered a 6.5/257 Roberts AI in a Remington 700 with a Lilja three groove barrel from my local gunsmith in a fit of craziness. Does anyone have experience with this round either shooting it or reloading it?
Thanks in advance!

 

[buffybuster]

Isn't this basically a 6.5x57mm AI?

 

[captpete]

Isn't this basically a 6.5x57mm AI?

It’s close but not quite... The Bob is based on 7x57... The case body is a few MM shorter. So, by the time everything comes together in an AI version, you come up with a short neck if you use the 7x57. From what I’ve been able to gather, it’s best to start out with an 8x57 to ensure your neck is long enough...