My only 20 is a 20 practical I had Jim Borden build for me 6-7 years ago. Talk about a freaking laser beam of death! My first two groups were .07 and .09”.....yes the decimal is in the right place. 39 blitzkings 8208 and fed brass. It shoots as good in the wind as my 22-250 and recoils like a 223 so I can see my misses and correct on the follow up shot IF I miss call the wind. Last year I shot three dogs off the same mound at a lasered 720 yards with three consecutive shots and two were pups. I’d say it blows pdogs up about like a 223 but not as bad as a 22-250. I think it might be my new favorite pdog rifle.
I think a 32gr bullet at 3500 and zero recoil would be awesome as well. My second favorite pdog gun might be a Ruger 1 in 22 hornet and 40gr polymer tipped bullets at 3100. I can’t imagine that your combo wouldn’t be even better. Hell..... just when I thought I had all the bases covered.... might have to get another #1 and build something like you mentioned.
