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My Lyman 49th lists some loads. What powder are you wanting to use? Lead bullet or TMJ?
Also I had a bit of a tough time with 147 gr in my MPX. I had two loads already made up that I tried and neither would reliably cycle. They were loaded on the weaker end of the chart for my son to shoot but still something to keep in mind depending on what type of gun they are being shot from.
Lyman lists blue dot in 147gr 5.3 to 6.6 gr with 1.115 oal.
I sometimes use a place called "steves reloading pages" he lists tons of powders in different grains. For Herco 147gr he lists 4.5 to 4.9 gr. No info on bullet type though so if you try it I highly suggest starting at the minimum and working up.