That's top secret
but enough!
Let's just say that all the bolts and pieces held tight!
Somewhat less than what an "expert" told me many years ago when I was getting started in this handloading business... I asked about loads for my M70 in .30-06 using a 180 bullet. He said: "Load 'er rounded full of IMR 4350, take a business card and swipe it across the mouth of the case, stick a 180 in and call it good". He continued: "You can never get too much 4350 in a .30-06 case to cause problems with 180s or anything lighter."
No, I didn't use that method with the 9.3, but I doubt you could get enough RL-17 in with a 286 bullet seated to cause problems. It's burn rate is similar to IMR 4350.
Bob
www.bigbores.ca