Max vel. for 100 gr .32 H&R w/ Brinnell of 12?

[Triggernosis]

I have a couple thousand 100 grain cast bullets from Missouri Bullet Co. that have a Brinnell hardness of 12. What is the max. velocity I should shoot for in my .32 H&R Ruger Single Six? I prefer to use HP38/Win -231 powder since I have lots of it. I don't see any load data in any of the 3 manuals I currently have.
Any recommendations, gentlemen?

[Wheelguns 1961]

I am sorry. I posted info for the wrong weight bullet. For a 100 grain jhp it says 3.3-3.7 of HP38.http://https://reloadammo.com/32-h-r-magnum-reloading-data/

[Bird]

https://www.hodgdonreloading.com/reloading-data-center

[atfsux]

I don't have experience with .32mag specifically, but when it comes to .38spl, a BHN of 12 is typically a limit of 1100-1200fps. And that is if you have sharp and distinct rifling in your bore. If your bore is worn or just shallow from the factory, be more conservative.

[Larry Gibson]

I have a couple thousand 100 grain cast bullets from Missouri Bullet Co. that have a Brinnell hardness of 12. What is the max. velocity I should shoot for in my .32 H&R Ruger Single Six? I prefer to use HP38/Win -231 powder since I have lots of it. I don't see any load data in any of the 3 manuals I currently have.
Any recommendations, gentlemen?

You don't mention barrel length but my own experience with my Ruger SS (original run) with a 6 1/2" barrel using 98 - 105 gr cast bullets of COWW + 2% tin with 231, Bullseye, 700X and RedDot is about 1000 - 1100 fps is max velocity based on keeping the pressure under 25,000 psi (actually measured). The bullets wit a BHN of 12 - 14 will go another 200+ fps with slower powders such as 2400, H110 and Lil'Gun. However, I find 'comfortable loads with the faster powders in the 950 - 1000 fps range.

[Triggernosis]

Thanks, gentlemen. My barrel is 5.5".
I just found a good bit of Bullseye powder in my stash that should work well also.