There have indeed been improvements. However, please look at the differences between new and old bullet technology.
The load you mention is a Silvertip for all intents and purposes. It is old technology and needs speed to operate correctly. The 147gr version may or may not expand.
New technology bullets, such as the Golden Saber, Gold Dot, Hydra-Shok (not Hi-Shok), etc. are made to expand at lower speeds and are more consistant.
Old technology bullets rely on hydrostatic pressure entering and unclogged hollow cavity. Once the pressure in the cavity exceeds the bullet's strength it then becomes hydrodynamic, pressing the bullet into a mushroom shape. At lower speeds the hydrostatic pressure often does not reach the critical point, forcing the bullet to open.
New technology bullets vary in design but are essentially made to do the same thing: Increase pressure along the cavity's walls. The Hydra-Shok achieves this by using a post in the center which directs the hydrodynamic pressure against the pre-stressed walls instead of the back of the cavity, forcing the bullet to open. Other bullets achieve this by different means.
However, all expanding bullets are sensative to one extent or another to speed in order to operate correctly.
My advice is, in that bullet range, to buy some 147gr +P something, or better yet, back off on the weight and go with the 124-127gr range.
Federal C9bp (Hi-Shok) expands well and can be had in 50rnd boxes relatively cheaply. However, 115gr works best and I do not know if they make 124 or 147gr versions.
A compromise would be the 135gr Hydra-Shok bullet. They proliferate around here though the city police use the 147gr version, standard pressure, as their duty load.
What it boils down to is this: Those bullets MIGHT expand but don't count on it.