Use the published load data you can already find for this load -- and using proper handloading techniques, reduce the MAXIMUM load by 10% and start there. If you wish to increase, do so while observing signs of pressure.
You will not likely find any load data for .40 S&W handloading that is specific for use with magnum or small rifle primers.
That's not to say you can't do it. You simply aren't likely to find specific data for it.
Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.