In response to a few prior posts (not Marbles' above), did anyone suggest loading overpressure loads and not recommended loads from manuals, or imply that all barrels shoot the same speed and have the same safe loads? Be reassured I'm going to use load manuals as a starting point since I didn't ask about load specifics. Ironically, a lecture on safe reloading and pressures from someone on the internet is of no use to me since I have published load data and reloading books.
My purpose in asking about short barrel load velocities is to better understand how what combinations of powders and bullets I might investigate to keep my short 30-06 useable as an "everything gun." So in a round-about way, my questions are relevant to the OP's inquiry. For me, a short, light, and very portable 30-06 constitutes an "everything gun" that enjoyable to hunt with.
For some context regarding the suitability of 30-06 for all game, my 22" 30-06 has worked well for me for a moose (40 yds, Hornady SST, bang-flop), handful of caribou (185 to 243 yds, 168gr TTSX, bang-flop), and a small black bear (183 yds, 180gr TTSX, bang-flop). I find it relatively easy to shoot with a steady front and back rest and focus on a smooth trigger pull. Spotting shots is possible on very low zoom, but should be easier once I have a suppressor.
For comparison, I shot a caribou at 103 yds with a borrowed 7mm-08 which to me had negligible recoil and was much more fun (and cheaper) to shoot at the range. However, I prefer to hunt moose and black bears with a 30-cal larger projectile hitting around the same speed. I now own a win mag and find the recoil acceptable only with a brake, so the 30-06 will likely remain my favorite gun to shoot. Yeah, I've read the .223 thread.