.257 Roberts AI feeding issue

[std7mag]

If you opened the feed lips for the 284 case, then they are too wide.
284=.500
257AI =.473

I built my AI on a Savage 111 that was originally chambered in 270 Win.
No feed issues whatsoever.

 

[xr650rRider]

I used one of 4D's .257 Roberts AI reamers about 3 weeks ago. You'll definitely have to use a throater to get to that length. I think mine is 2.810" with the 115 Nosler BT just touching lands. Shooting good so probably won't mess with the throater.

Ned to correct the length. My measured COL is 2.9800" just touching lands with 115 grain Nosler ballistic tip.