When one sees a round nose bullet, or a flat nose bullet one should pretty much deduce that it's a low velocity (by today's standards) designed bullet. This isn't a I told ya so post, it's for some whom may be wondering. If I had doubts and wanted to REALLY KNOW, I would have done the same thing you did 1longshot.
The reason for this, is the wider face of the bullet absorbs more energy causing more deformity, or mushroom if you will. The spitzer type bullet with the sharper nose is designed NOT TO SHED VELOCITY as quickly, but is reliant on higher velocity to expand.
It is similar to comparing an "ice pick to a 4 lb. shop hammer" in many ways, other than the ice pick were it a bullet would deliver far more "hydrostatic shock" INSIDE THE BODY while the shop hammer would deliver a more crushing blow in the impact area. This may not be a clear picture but I am limited in my communication skills.
All in all, it is a pretty safe bet that if the bullet is a round, or flat nose, and has a cannelure, it is for loads under 3,000 fps, and probably for loads in the 2,500fps range or below.