RedofTex,
The proof marks show the correct caliber is 8x57IR( AKA JR).This ammo is available. In spite of this, there is an outside chance you can also use 8x57IRS (JRS). If you fire an 8x57IR cartridge and a .323" bullet will fit easily into the fired but unsized case, then you can use 8x57IRS (JRS). If it will not fit, then you should only use 8x57IR. If you don't want to do the test, you can always safely use 8x57IR.( as a caution, in performing the test, use a bare bullet, and check with the shank. the nose will not be .323")
Both cartridges are great and you are not disadvantaged with either. I have Kahles scopes and you are sure to be satisfied with yours. The insert barrel( Einstecklauf) makes the drilling a universal gun, I have used them to shoot fox, bobcat, hare, racoon, and squirrel. All in all, you have a great rig.
Mike
Last edited by Der Ami; 04/25/19 10:47 AM.
