I have a 1916-vintage Police Positive Special in .32-20, too, and last month for the first time saw a load that I'm afraid of: a 100 gr. JHP from Load-X. When it first appeared at the site below, it was listed @ 1600 fps. That sounds like .327 Mag. territory, so I have to guess that the pressures are considerably higher than the standard 100 gr @ 1200 fps from Remington and Winchester.

I emailed the manufacturer, and got the following response:

"The .32-20 HS ammo is designed primarily for modern production guns. I'm
not sure of the Colt Police Positive. Back then, heat treat and metalurgy
wasn't what it is today.
That much being said, it is not a max loading for the .32-20.
Have a gunsmith check it out and bless it."

How many "modern production guns" are made in .32-20???

If I was convinced it was safe, I would like to shoot small numbers of these (one or two boxes), but I'm not going to do it unless I hear that others have shot them in that gun with no problems.

After the first couple of weeks, the MV figure disappeared from the Ventura site, but now it's back. Why would they play peek-a-boo with the velocity info?

32-20 Winchester 100 Grain JHP High Speed LOAD-X