We shoot targets, plates & other materials of various sizes and shapes, at various ranges - from card splits at about 15 yards including horizontal string cuts - straw cut on a 45 degree angle and a coroplast board with 3/4"holes, with used shotshells stuck in the holes. It's a great target as they are set base towards you and you have to punch the empty shell casing out of it's hole - called shots - board lined off in felt pen 1-10 and A to J so there is room for 100 shell casings on the board. We tired of that, so started calling spiders only - ie: must cut all 4 lines intersection crosses on the lined off board. We used a white coroplast board 4mil so the black felt pen would be quite visible. The last coroplast "shell" board we put up is several years old and the felt lines are still proud.
The steel targets/gongs vary in size as noted - some are animals, like turkey at 100yards, duck, bunny- 100yards, fox 92yards, miniature buffalo- 50yards, tiny crow/sparrow 20yards, gopher 30 or 40yards - round gongs, triangular, square, buckets, barrels - gong hanging inside a pipe, so that it rings like a church bell with a hit on the outside one - clang/clang, clang/clang - etc. The 20 bores, 62 rifles and the 14 bore REALLY slam that one - rings for a full minute or more, but even the .32 would make it ring - once. Horizontal stainless 'bar' about 2" in diameter hanging at about 40 or 50yards is a toughie. Vertical thick walled pipe hanging straight up and down, maybe 2 1/2" in diameter, easier, of course because it's so big. Toilet seat at about 60yards - surprising how many shoot through the hole. Many of our gongs have been used for 15 years or more, others eventually get holes and break - the .69 & 20 bores with WW balls is hard on targets. I shoot a 15 bore WW ball out of the 14 bore rifle with about 86gr. 2F - only 1,230fps, but smacks fairly hard.
All are visible reaction targets in that there is a reaction when hit. Strings are cut, cards are cut, gongs swing and ring or BONG when hit. Note that it is important to have some 'gimmy' targets, so everyone hits at least some of them - our course of fire is some 55 targets long. We walk along a path in the bush, stopping at numbered signs on posts maybe 2' or 3' high and shoot from the sign. Black numbers are rifle targets, red are handgun targets, closer and much easier, of course.