Is your omega a 50cal? the p would be fine, it burns at a faster rate than ff, so
it'll work good on light bullets but the heavier (350gr.+) don't usually agree with
such a high rate of acceleration. The p will produce a higher pressure than the ff, so reduce your load by 15% to be safe. Also the p usually burns cleaner than ff of the same brand so that should help with the follow up shots if you don't swab first.
Hope this helps,
Grape.