S&W M 29 .44 mag (4")
240 gr HS FED 1,094 fps
200 gr GDHP SPEER 1,009 fps
Looks like the 10mm is at or near the top of the heap when compared to any revolver caliber with a 4" barrel (which is equivalent to a 5" auto after accounting for chamber length).
Yeah, uh, no. Those are not top end revolver loads and you're obviously looking at energy anyway. An absolute top end 10mm load is a 220gr at 1200fps. The .41Mag can get 265's to over 1300fps. Meanwhile, the .44Mag tops out at 355's at 1250fps and Ruger only .45Colt with 360's at 1100fps. So no, while it's very capable, it's nowhere near the top of the heap.
