POA vs POI

[SciFiJim]

I have a Marlin .357 with a scope (aging eyes). What I would like to know is where to set the point of aim for the scope. I use four different boolits, a 158gr plain base, 156 gas checked, 180 plain base and 180 gas checked. Each shoots to a different point of impact. Should I set the point of aim for one of the boolits and remember where the others impact in relation to it or set it somewhere between all of them or reset my scope for each as I use that particular boolit?

[NickSS]

I assume you have been shooting for awhile and know how to hit what you aim at. If you are a plinker then pick a POA that is close to most of your loads and bang away but if you are actually trying to take game with your rifle I would pick a POA that is the same as the POI of the load you are using. Missing a tin can is one thing but missing a grouses head is another.