Best weight for a solo round disc?

I was thinking about getting a Lone Star Harpoon in Victor 2. I can probably get one 170g-175g. I want a disc in that plastic because I have a Jackrabbit in Victor 1 that I really like, and it floats; I have a lot of water at the course I play at and I don’t feel like losing any more discs. I don’t want to use my Jackrabbit as a solo round disc because it’s my man putter and I don’t want to scuff it up too much.