We recently tested 10 mm Federal 180 gr Trophy Bonded JSP (P10T1) fired from a Glock 20.
Average velocity was 1244 fps. At 25 yds on an NRA B8 target, slowfire accuracy was 96-4x.
BG: Pen = 16.2”, RD = 0.58”, RL = 0.48”, RW = 180.5 gr
Bare Gel: Far left is Speer .45 Auto 230 gr +P G2 control; then 5 recovered 10 mm Fed P10T1 bullets, with a dime to the right
Performance in 4LD and Autoglass was not stellar, in fact many good duty loads in standard service calibers offer better terminal performance for defensive use...