ok well i knew it was something like that.I knew it had something to do with the .270 so thanks for the info and clearing that up for me.The 6.8SPC is not a necked down 270. A group of special forces soldiers got together to find a heavier bullet for longer range effectiveness in the atmosphere they were fighting in, the open dessert. They needed something that would be an easy swap out on their existing battle rifle that they could use all the other parts but the barrel for.
The cartridge they found to use as a base was the old .30 Remington case which was a semi-auto version of the 30/30. It was used alot after the turn of the century(last one). All they did is to neck the .30 Remington case down to 270 and load it with a 110grain 270 bullet. The ballistics look impressive for woods range small to average size deer and would be a great kid or wife deer rifle in a little bolt gun. With Barnes making a 110 grain copper bullet, you should get the same penetration as a 130 grain lead bullet of the same velocity. I wish I could find one or two in the old Mark X action, I got two little ones coming up to deer hunting age in a couple years.