I had this 7x57 built by a local gunsmith on a pre war oberndorf action when I was in my mid 20's and still young and foolish.

[Linked Image from i.imgur.com]

I don't know how he cut the chamber but it shoots the full range of bullet weights accurately. 120 Ballistic Tips, 145 Power points, 154 Hornady's and the old 170 Sierra RNs.

Not a target rifle but I get 1" to 1 1/2" if I do my part.

Dan