You should give more info regarding your target barrel.
In the last 2 years, Ruger put on their guns
target barrels in 2 lenghts: 20" and 16.25".
If your barrel is hammer forged,
you can see the helix striations along the outside contour,
and you should say so.
Is it blued or stainless???
Is it gloss finish or flat?
These barrels, while they can be a lottery sometimes,
it is not un-usual to find an ammo that would group decently out of them.
If you want to sell, I believe you can give better info (if you know it)
if you say sumpin like
"it holds 3/4" (or 7/8", or 1" or whatever) with Lapua Standard Plus @ 50yds)"
or whatever the case may be.
The hammer forged barrel, depending on the above data
and on its condition, usualy can bring (used as 300 rnds.) a price of
anywhere between $100 and $130.