We are all familiar with using fired rimfire cases as 224 bullet jackets. They can also be used for 6mm/243 jackets. My buddy Richard B showed me some loaded 243 ammo with such bullets and a separate bullet. The final point forming operation is don in a professionally made die but the drawing and core seating operations are done in dies he made. He intends to make a point forming die when he can find the time as it is painstaking work. The bullets are beautiful, FMJ with the base exposed rather than the tip. They are semi spitzer style. The headstamp has disappeared completely and the striker imprint is barely visible. They are only 75 grain which is about the heaviest that can be made with rimfire jackets.  I had the idea, based on nothing, that a 75 grain 243 bullet would be very short, but these are 18mm long and nicely proportioned.
Rimfire jackets are thin and expand explosively on game so can’t be used for hunting. While I’m not too clear on the point, I seem to recall that they can disintegrate in flight above 3000FPS because of high centrifugal force. They are really a 2600FPS proposition and a range only proposition, but are ideal and very cheap for that purpose. The 243 case is really too big, the 6 x 45 would be ideal.  Its a pity that they are so slow to make and the tooling so expensive.
[Originally posted to SATalkGuns -- Admin]