Originally Posted by Todd.K
The bigger hole through the barrel makes a 300 BLK lighter weight with the same outside dimensions as a 5.56 barrel.
Without having barrel weights listed or knowing the "wall" thickness makes it hard to understand weight and when things get too thin for barrel rigidity. I'm not really worried about bursting a barrel with high pressure loads but, I don't want bad barrel harmonics or barrel slump with reasonable rates of fire either.
I don't want to end up with a rifle like some of the ultralight bolt actions where three rapid fire shots heats the barrel up too much and makes the third round wander off significantly.