I use a press, and have used various sizes of bullets in my rifles in 7,62x54. The best accuracy was with Sierra Hot Core .311 I think they were 150 grain Soft Points.
For economy I use .308 bullets for .30 Carbine due to the fact that I load .30 carbine, and have a lot of them on hand. I use Trail Boss, and the 3.1 cc dipper that came with the die set. They are easy on the shoulder, and sound like a .22 LR and have a loud sonic crack afterwards. They shoot minute of 4 inch steel plate at 25 yards, and hit it harder than .357 Mag does.
Here is a link to a youtube video of me shooting one at the range. Note how it is not that loud, then the sound of the sonic boom. They are ton of fun to shoot.
http://youtu.be/WQ0b9dsMlXE