The one I posted are from accurate shooter web site. A lots of guy just use a stick on dot or even just make a dot with a marker on a cardboard box. And those are ELR guys.
Dot size does not matter on the target I posted..what matter are the scope alignment vertical and horizontal. So no they don’t make group bigger. Only the shooter can do thaton top of, in load development - aiming point matter - crossair alignment - not the point of impact that vary with powder charge or whatever a guy test.
When you see all crappy targets showing at the range, all those are 500% better.
I use this one in blue. Can be seen a lot better on crappy overcast or rainy days. Picture is crappy but if someone want a .pdf , just ask. And you don’t shoot the triangle - aiming at it only- you adjust scope a few click up so the round impact in the round circle or above.
Those were made originally by Sinclair for Benchrest gun load development.
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I really like this style of target. My POA is never the same as my POI...some of my buds say...jeez...you missed the bullseye by 2 inches...lol