steve white,
I have a "pile" of Rem.8mm/170gr bullets for their 8mm Mauser ammo.These bullets measure .3215",which was one of the things they did to hold the pressure down,together with "light"loads.
B.Dudley
If Rem.8mm Mauser won't chamber,call Buffalo Arms.They have a selection of .318 bullets and sell custom loaded ammo.They may have 8x57I( they may list it as 8x57J)ammo for sale.BTW, if they don't show it on their website,call anyway.
Mike