I have used 414 in the past, it was just a "also ran".
But IMR 4350 was outstanding.

I don't load 100g Partitions, simply because I bought about a doz boxes of 85 & 95G partitions, some years ago.
The 100g Partitions are excellent bullets you will do well using it.
I like Hornady 100G RN and Sierra 100G Spitzers, pushed with a 40G load of IMR 4350. Its not a hot load, but has proven most accurate in a couple 243's.
CW