9X18 Ultra/Super Reloads??

[Ultima-Ratio]

Hello, there has to be someone that has some experience with Walthers 9x18 Police/Super/Ultra?
I know I can start with 380 data but I wondered what with all the new powders if anyone has perked up the cartridge?
115s@1000fps, maybe 1100fps?
Thanks all!

 

[Reed1911]

I would actually use 9x18 Makarov data for the 9x18 Ultra. The .380 data is going to be very low on the starting end and at max you'll only be 1/2 to 2/3 of the capability. The only difference between the Mak and Ultra is the .3mm size in dimension. Same pressure, same weight, etc.. I would not think that you'll reach the absolute max before you see pressure signs, but you should be able to gauge some pretty good loads.

 

[Ultima-Ratio]

Thanks-

Thanks for the response Ron, pretty much what I guestimated. I worked up loads some years back for a Mustang I converted but it has a locking lug unlike the new/old Walther....back to the Dillon and then to the range to chrono...it never ends eh!!