I have a magnum ADL and BDL synthetic stock still.
The 300 RUM lilja barrel sold a long time ago.
I have a used stainless take off 300RUM barrel, a used 26" blued 7RM take off barrel, and 2 new 24" 7RM take off barrels. Those are all for Remington 700's.
I also have a SS #4 fluted McGowen 12 twist in .300RUM. I believe it is 26" long but might be 25.5". It has a 4 port side discharge type brake installed as well.