jwall,
I doubt you are going to find reputable published loads at that level (except perhaps in older manuals, but notice the claimed velocity on the Speer #11 load) simply because it exceeds SAAMI guidelines for the 6.5x55 of 46,000 CUP/51,000 PSI.
Denton's pressure tested load shows 59.4 KPSI, which exceeds the SAAMI max by about 16.5%. That doesn't mean it's unsafe in your Winchester FWT, since that action should handle it just fine. If you want to use Denton's load in your rifle, by all means do so.
But finding that as a published load? Nope.
P.S. You may also wish to label any loaded ammo as "6.5x55 @ 60k PSI" so it's never mistakenly loaded in an older 93, 95, or 96 Mauser.
