For the cost of .32 Long/NP a set of Lee dies and supplies from Midway was less than 3 boxes of ammo, at least a few years back. I bought some Remington brass and 98 gr lead bullets by MagTec from Midway and picked up some LSWC cast bullets from a local Gun Shop. Data was found in my old Speer No. 9 manual. The loads where specific to "Modern solid frame pistols" of which a Colt DS or Police Positive made 1950 or later fills the bill. Most of the data you find on line is rather anemic because they default to the pressure capabilities of the old break action "Saturday Night Specials" made in the early 1900's. I have seen Colt Police Positives and Detective Specials that have been chambered to .32 magnum
The loads I made using Unique duplicated the velocities shown in the data below when chrono'd from my 4" Police Positive. In the small .32 case small changes in charge wt really ups the pressure and velocities so be careful when increasing your charge weight.
https://www.dropbox.com/s/uveji3kokfcbef2/32SWLongSpeer9markup.PDF?dl=0
The loads I made using Unique duplicated the velocities shown in the data below when chrono'd from my 4" Police Positive. In the small .32 case small changes in charge wt really ups the pressure and velocities so be careful when increasing your charge weight.
https://www.dropbox.com/s/uveji3kokfcbef2/32SWLongSpeer9markup.PDF?dl=0