Re: M70 target barrels ...
I think the books are confusing folks. Winchester made the target model. They had the national match, which is a sporter contour and then they had the bull gun, which was pretty darn rare, I don't think it was made in enough numbers that Lilja would say " this is the contour used on pre 64 target models" if it was a bull gun contour,
The Military had to give them different names because they tested them all, and they were all "target" guns made for competition. So to cut back on their confusion they called the national match the target, the target the medium target and the bull a heavy target.
I'd call Lilja and ask to make sure im not talking out my a$$ and later today ill measure the muzzle on my target and see if it matches up.