WTD - LOAD DATA FOR 10.75X68 - NEW ACQUISITION Hello all, I have just received a new acquisition to my Big Bore rifle assortment. I found a Type B Oberndorf Mauser in 10.75x68 caliber. I would like some help from forum members with loading data. There doesn't seem to much around for this cartridge. I started actively searching for this specific rifle because I wanted a Mauser Sporter in this caliber. The 10.75x68 represents the largest Mauser factory cartridge available in a standard an unaltered action. My search found this advertisement. (no photos were available) Up until now, I have never purchased a rifle without seeing photos first. But, after speaking with the seller, I decided to take a chance because he offered a 3-day inspection / return, and said his only computer access was through the local library. When expalining the rifle's history, the seller said he was the first U.S. owner, and that he had the rifle brought back from Africa with 2 other Rhodesian Game Department rifles that he purchased. Here are some photos of the rifle taken when I received it. According to Speed's book on Oberndorf Mausers, the rifle dates to early 1924. It has the early B U proofsand it is all original with all matching numbers, every the trigger matches. As would be expected from an African Game Department rifle, it shows a life of hard use, but not abuse. I'm not sure how many of its 90 years were spent in the jungle, but based on its looks, I'll bet it was most of them. As you can see from my photos, the butt-plate is missing and it looks like its been missing for a very long time. All the butt stock edges have been worn "rounded." There were 2 stock repairs, one on each side of the forward part of the forend. These thin forearm sides nearest the tip, either rotted away or were worn away. I don't mind the repair; is not too unsightly, and it just adds to the story of this rifle's hard life. The right side repair can be seen in the 4th picture from the top. It shows a 6" long sliver of replaced wood. The left side has a 5-1/2" similar repair. This was definitely a working gun. All the metal has a worn brown finish with lots of salt & pepper surface. Its completely coated with old hardened oil that has turned into scale varnish. When received, the 50-1000 meter tangent sight looked like it hadn't been moved from its 50 meter position in over 50 years. It was varnish-glued in place. It took a lot of soaking and torch heat to restore its function. The bore is very dark but does have strong rifling remaining. I'm currently soaking it with bore cleaner and scrubbing it daily. I'm expecting that Hawk 347g jacketed bullets will shoot just fine. But, I don't know where to start with loading data, as I find none available. I'd like to start in the 1700fps range and work my way up. Even at that low starting velocity, I'm expecting the under 8 pound rifle to kick quite a bit. Recoil calculations indicate between 33 - 35 pounds at this level and up to 50+ pounds at full velocity. So, if any of you would have a suggested starting load, please be so kind as to let me know. Awaiting your reply.