Its do-able bro. Watch the guys swaging 357 rem bulk pistol bullets down. You seriously dont want them. I'd have to look and not promising but I may have a few 357 max brass left I could convert for ya. See you kinda got a tough spot. Since DKT no longer produces the projectiles then Ben is right, casting is king. That being said a hard cast fully round nose aint much the killer. And you do need that stout round nose in them. I tried swaging down spitzers, you name it, and unless your going to go pathetically slow like 1300 fps with 4198 the pressure just wont be there to operate bolt. I stand corrected. I got out my log here and in reading it I see I did take some 180 grain speers, knock the exposed lead off flat, swage them to .352 and stick em on 22 grains of AA 1680. My log says it made the 1800 fps, operated the bolt and was accurate. If all else fails I think theres about 30 357 max with the rims turned down. If you send me a parent case I can cut the grooves then you can trim em to length. But I seriously do advice that you try to find a continuous source cause of how picky these pricks are on having the right chamber pressure you dont want to be changing brass every time you change your socks or it'll never work the same way twice