"Scott Seidman" wrote

Why not go one of each, and let the fish decide?

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good, practical, suggestion

but

"mucking with tackle" is 99% of what I don't like about nymphing, and two
flies is more than even double mucking ...at least in my tangled hands


plus, my current decison is what sizes to tie and stock

lets take PMDs, the most widespread bug I fish over .... you find them in
the 16 to 20 range ... and my dry fly selection is heavy on the 18s and 20s
since I 'know' that Mr Trout will eat an 18 if the real thing is a 16 but
not always the reverse ....

Based on your ( all readers) experience, can I plan on the same size bias at
the deep nymph level?