Checked the site. You will come to a page during checkout that asks you to log in or create a new account. I did an estimate on shipping to Delaware and it was $20.00 for 2 boxes of the buckshot. That added $10.00 per box to the cost.
AmmoFast will only charge $10 up to 25lbs so when I ordered it was only $10 for 4 boxes.
https://www.ammofast.com/collections/12-gauge
I haven`t tried the slugs yet but the buckshot pattern well in close quarters and with the light recoil provide for a faster follow up shots. I`m currently using NSI 2 1/4" 6 pellet 00 buck in my SW, same light recoil but they hit harder and pattern better. I like using a light recoil for the little hand cannon and save the heavier loads for my 88...