After four kids finished collage, married and became self sufficient and the home place got paid off I found there was a small amount of funds now to pursue some long enjoyed pursuits. Mostly acquiring and shooting some old military rifles.
One of my most rewarding acquisitions was a Model 78 Swiss rifle chambered for the 10.4x38mm R Swiss or as we call it the 41 Swiss. Now this is a rim fire cartridge and ammo is almost unobtainable so with the help of some U-Tube videos I was able to convert her to center fire without to much trouble. If you have ever fooled around with old guns you know that tolerances for barrels was not up to today's standards so the first thing I did was slug the barrel and found a grove diameter of .425 inch. After a quick internet search for a custom bullet mold maker I found Accurate Molds with a large on-line catalog of bullet molds that he will cut to any desired diameter. I ordered number 43-335B double cavity aluminum mold with a diameter of .435 inch with my specific alloy and the cost was a very reasonable $90.00.
It arrive in short order and cast beautiful 318 grain bullets with two crimping groves. The top grove is perfect to keep OAL correct to work through the action. So far I have worked up loads with Trail Boss, 5744 and IMR 4198 and all have shot well with velocities running from 1044 fps with Trail Boss to 1357 with 5744. I would appreciate suggestions as to other powder that might be appropriate for this old timer and info about other 41 Swiss experiences.