Those Targex will be a nice mix of speed and thump.
I'd avoid the 50's as they may (may not) spin up to much and become vapor before they hit the target.
1-7 Is really fast for the light pills with so much powder and as you said, it kinda defeats the purpose.
We used to use the 45gr hollow points from Winchester... lots of puff on plovers.
75 Eldm will also be a nice round too.
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