I curently got and awsome deal at wallmart on some Remington express and nitro STEEL #2 and #4 23/4 inch shells. I bought out wallmart walking away with about 25 boxes. I was wondering if these shells will have good power for ducks. In the past several years I've used Remingon 3" #2's. Will the shot size and the shorter shell make a big difference? Thanks in advance for any input...