I think the 357 wins
https://www.buffalobore.com/index.ph...t_detail&p=100
1. 3 inch S&W J frame
a. Item 19A/20-180gr. Hard cast LFN = 1302 fps
b. Item 19B/20-170gr. JHC (jacketed hollow cavity) = 1299 fps
c. Item 19C/20-158gr. Jacketed Hollow Point = 1398 fps
d. Item 19D/20-125gr. Jacketed Hollow Point = 1476 fps
2. 4 inch S&W L frame Mt. Gun
a. Item 19A/20-180gr. Hard cast LFN = 1375 fps
b. Item 19B/20-170gr JHC = 1411 fps
c. Item 19C/20-158gr. Jacketed Hollow Point = 1485 fps
d. Item 19D/20-125gr. Jacketed Hollow Point = 1603 fps