".303 Savage is easily made from .30-30 or .25-30 brass."
Head diameter on the .303 Savage is .442.
Head diameter on the .30-30 family of cartridges is .422.
.02 is getting to the point where you don't really want to try it.
A better route is to head swage .30-40 Krag cases.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.