Apparently I need to up the pressure in my cast bullet loads for my Type 99. I'm using reformed Remington 8mm Mauser brass, as 7.7 brass was rare when I wanted to load these. There were a number of shots where there was a fair bit of a smokey breeze coming out of the wrong end of the rifle, and a good inch of soot down some of the cartridge case. Think I'll switch the load from IMR 4227 over to Winchester 748; Win 748 runs higher pressures for cast loads at similar velocities, which should form that case to the chamber nicely. Or blow smoke into my face at even higher pressure.