Alliant 2400 is a bit quicker than AR2205 and IMR4198 is supposed to be equivalent to AR2207. AR2206H is equivalent to IMR4895 (too slow for a reduced load - no suprise that didn't work). The AR2205 did suprise me though - I used 35gns and this is not entirely out of the ballpark, I thought (although this may be more true for bottleneck cases rather than straight cases, which apparantly is a different kettle of fish for reduced loads).

With the usual cautions for load information (no liabilities for loads given), can you tell me how much you load for the powders you mention? Do you use fillers for any of these loads?