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Evan, you are correct - 4831 should NOT be used for reduced loads, period.
There have been documented cases of severe overpressure using reduced charges of 4831 (specifically the Hodgdon variety, but IMR is suspect, too).
I looked into this once with a 7 RemMag, and darn near wrecked the rifle - which belonged to somebody else! You DEFINITELY can create a severe overpressure with reduced charges of H4831.
SR 4759 powder was specifically created for reduced loads in rifles. So it's a great choice. But it's not easy to find or always available.
Another powder created for that purpose (and superbly done) is Accurate Arms 5744. In the 25-06, the AA manual calls for a 100-gr lead bullet (gas checked) with 22.0 of 5744 for 2000 fps and only 24K pressure. I'm pretty sure it'd be OK to substitute a jacketed bullet with pressure that low, but no guarantee.
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