I would imagine that the 147 cartridge would jam on the bottom of the barrel feed ramp more. The round is slightly longer than the 124gr rounds. The 147gr cartridge starts closer to the bottom of the feed ramp.
How much longer? I can't measure any difference in length between the 124 and 147 gr. Plus, I tested other rounds that are longer and had no issues.
I did find out some more interesting things which I posted about here
Long story short, the 147gr Hydrashok rounds have a larger rim than all other 9mm rounds I can find, including the 124gr Hydrashok. All the others have a rim diameter that matches the rear end of the case. But the 147gr Hydrashok has a rim that's 0.1mm bigger. So if you take 2 of them and slide them together, they don't slide past each other smoothly - the rims catch. All the others slide smoothly. This *seems* to make the 147 Hydrashok stack more loosely in the magazine. But I really don't know if that has anything to do with the issue or not.