I bought some of those and a guy needed them so I let him have them.
I did open 1 box and compared them to the 120 Matchking and was amazed at the difference.
1 of my 6.5/06`s has an 1 in 11" twist Hart.
I built it for speedgoats, and 120`s. Big fat #7 barrel in a McMillan Sako Varmint stock.