Just for info.
all my shell testing over the years was done on the late Bob Braithwaites ball trap layout throwing 80+m targets,
Bob's favourite shell in the early 90's which I supplied him after winchester dried up, was the express HV little 67mm low brass shell, smooth, not quick despite the name, but killed anything he shot at...
And an old caravan in the yard for pattern testing........
Pattern kills the target not speed, a fast shell does not hold as dense a pattern as a slower one at distance.
An average OT target is shot at 30m for first shot unless angled, that can add as much as 1/2 a second on to the time the shot is taken, the second barrel average is 35-45m, anything that is killed after that distance is a mix of skill and luck.
A shell that is new to the UK and in the right price bracket is the Pegoraro, brought in by Tom at Continental shooting supplies looking forward to trying them, will put some through the chrono and see what they are like on the pattern plate at different distances.