Doug,
I may have mislead you, unintentionally, but I haven't shot anything over 7/8 oz. at a dove since '03. i use a 20 on doves with the exception of a couple shoots early each season when i use a .410. In fact, last year I took 52 birds, (my buddy says 69) with a .410, and the last 10-12 was with 1/2 oz. loads.
I may be "overkilling" the clay birds in competition with the 1 1/8 oz. loads but, the recoil is not an issue with my big Perazzi, and the confidence level I have with them is worth a lot. I won the Sunday Make-A-Break at a major shoot a couple weeks ago using 1 1/8 oz. loads by breaking 4 out of 5 no. 7 birds, which were an estimated 90 yds. I just don't believe I could do that with lighter loads. The density of even 1 1/8 oz. loads at 90 yds. with a .020" choke is dubious, less than that even more so.
Totally agree with you on the doves. Anything over 7/8 oz. is a waste in 98% of the situations.
SRH