I’d go with .359 and get the throats reamed. Ruger has a well established history of undersized cylinder throats. I’ve got 6 Rugers and needed to get 2 reamed.
I tried to find a compromise in projo size the first time I ran across it. It leaded either way. After I got the cylinder reamed and was allowed to run the proper sized projo for the bore, everything was right. When I slugged the bore and cylinder on a later purchase and found the cylinder throats undersized, I didn’t even try. It just went off for reaming. No regrets.
Just my 2 cents.
