1 1/4 oz load: 29.5 ft/lbs, 15.4 ft/sec velocity
1 1/16 oz load: 21.2 ft/lbs, 13.0 ft/sec
1 oz load: Can't find any listed quite that fast. 1200 fps would be 16.1 ft/lbs, 11.4 ft/sec.

All of the above in an 8# gun.

I can tell you from experience that those 1 1/4 oz 16ga mags in a light gun will get your attention.