My first really custom-ordered-from-a-gunsmith rifle in 50 years (all my customs prior to this one were built by me or bought off the used rack) was a 1909 Mauser in 7x57 (a cartridge caliber I had never owned). It was built to use in Africa and specifically for the 175gr Nosler Partition. I am just about going to have my 3rd and last custom built and the action will be one of the Mausers Sarco is selling. Barrel is a 8.5 twist 7mm Krieger and it will be in 7x57 again throated for a 175gr Nosler Partition. I used my custom on my last safari I made and took several Kudu and Impala quite handily. Ranges from 50 to 300 yards. Nice caliber to finish on in my estimation.