Originally Posted by Ramblin_Razorback
Wouldn't about half the 300 to 400 fps difference be due to higher pressure loads and barrel length?




Originally Posted by Mule Deer
That would be about right!


Actually I'd say a bit more than half....the 6.5 X 55 loaded to equal pressures is indeed an impressive round and don't take much of a back seat to the 6.5-06