The recommended tracking force for all the (better) Shure carts is 0.5 - 0.75 gm. You can double check the specs for your particular cart at:
I own 2 Shure V-15 Type III Cartridges, and directly from the factory booket that came with this Cartridge, VTF is recommended fro. .75gm to 1.25gm.
Typically, I'd usually set my own at 1.2gm, as at the lighter settings, mine seemed to get quite woolly, and not play at it's best. Tracking seemed to go to hell in a handbasket, at least with my tonearm-table combination I was using at the time. Your mileage may vary slightly, and with a good high quality arm, and Solid table, you may be able to use the factory recommended settings to good effect.
I'd also like to add that these specs were no doubt for the VN35E Stylus, so I don't know of specs were changed for the later, and I understand better MR? (Micro Ridge Version)
If there's any other info you'd like to know about the Type III, just give a holler, as I have the spec booklet here, and can give you any spec for this cartridge.
The Sure V15 series has a earned rep for harsh, brittle and almost unlistenable bright sound. They were a standing joke among most 'philes decades ago. The only cure (and a partial one at that) was "MORE" weight. Most of us (that would end up with one of them, from time to time) would track them at 1.5 and perhaps a tad more. Mine always sounded best when the cantilever was driven up into the cartridge body and the stylus was leaving "curly fries" of vinyl in its wake.
I agree. After all the garbage of the 70's that I went through, I physiatrist would help as well. Just the thought of the first V15, the maiden runs of SS amp's and of course all the JBL's and Altec's that went through the house, it's a wonder that I can hear or think at all. "Some" of us still remember the only choices that we had for cables at that time. Downright pathetic.
I do hope that they improved the V15.