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Yep, I have been over more powder-maker data than I can shake a stick at. Sir Bob (member CZ550) and Sir Jerry (gunner500) have too.
Your H322 is considerably faster in burn rate and bulky in comparison to the powders that Sir Jerry, Sir Bob, and I have found best,
along with the longer COL for added capacity and pressure reduction with increased MV.
Considering your SAAMI limited COL and and the speed you got with H322, that is excellent.

I have not damaged my Oehler 35P yet, but find the Caldwell G2 just as reliable, and with auxillary light source, and much handier and quicker to set up.
The old Prochrono was reliable too until a shotgun wad knocked it out.
I always precisely place the first screen 5 yards from muzzle, finding that prevents muzzle blast interference.
I can thus get a 5-yard correction for BC.
I even give credit to Sir Bob for his MagnaPorting, stated up front, to be backed out of if not appreciated.

Here is Bob's load with H335:



and Sir Jerry's:



I was able to get the 450-grainer up to 2469 fps MV with 84.0 grains of AA-2230 and 3.680" COL in a 25" barrel.
But that feels like cheating when it is over 3.6" COL.
I am waiting for the weather to break so I can try a lesser amount of AA-2230 at 3.565" COL, after I try the heavily compressed H4895 at 3.595" COL.
Hijack off, back to the .458 WM thread with me.