Re: 10mm reloading question
I bought a Delta Elite Colt 10mm the first year it was introduced and have been shooting it every since. My regular load is 175 grain Rainier plated bullets and 5.5 grains of W231. That works out to be 1002 FPS in my gun. The recoil is about the same as a 45ACP in a 1911.
For more excitement I shoot 200 grain Hornady TCFMJ bullets with 10.1 grains of Accurate Arms #7 for 1034 FPS. This load is a twister in this gun with a healthy recoil. It is a bit too much "fun" for me, normally.
Hodgdon's latest addendum manual lists 180 grain JHC at 5.4 to 6.0 grains of Titegroup. Dropping to the starting load (5.4 grains of Titegroup) would probably be just fine for a cast bullet. Try it, chronograph it, and slowly increase the load until you reach your desired 1000 FPS. For added insurance against leading the bore I would use the plated bullets (Berry's or Rainier).