The lightest X-bullet I have used in a .30-06 was 150 grain, which was more than adequate for whitetails. I have never used a 130 grain x-bullet in .30 caliber. X-bullets are strong - very strong, so, although it is "light for caliber" - you can consider it similar to about a 150 conventional bullet. Still, for whatever reason, I would rather use a 150 X as the lightest. What is your intended purpose for a 130 x?
Zachary