By "Major Load" info - - -
- - - I assume you mean "heavy loads," is this correct?
I haven't shot in a formal IPSC match for many years, lbut there used to be a separation point between "Major" and "Minor" loads. I seem to recall that the break point was 175,000 momentum, as in, bullet weight times true velocity. Thus, a .45 bullet weighing 200 gr, at 875 fps, would just make 175,000. Most of the guys who used 200 gr bullets tried for about 900 fps, to give a fudge factor. Easier with a 230 gr bullet - - 770 fps does the trick.
Anyhow, the attempts to "make major" with the 9 mm and .38 Spl cartridges led to some serious mishaps, and they were ruled out for competing as major power loads. As a practical matter, it is impossible to safely reach that point with the 9x19 mm, and you have to reach beyond max published loads to do it with .38 Super.
As to 9mm heavy loads, you can attain well over 1200 fps with 8.9 gr of HS-7 and a 124 gr. Speer bullet, and also with 7.9 gr of Blue Dot. These are MAX LOADS from the Speer Reloading Manual, No. 12, and clocked from a 4" S&W barrel. I realize you'll get a bit more from a G17, but your power factor will only be around 150,000.
I realize certain custom and premium ammo loaders will sell you ammo claimed to be a touch hotter than the values above, but I doubt they'll give you their formulae for reloading.
Best of luck to you - -
Johnny