This topic should bring out the opinionated among us. But I think we will see some standard answers.
In no particular order.
Pistol:
.22LR
.38 Special
.357 Magnum
9MM Luger
.40S&W
.41 Magnum
.44 Special
.44 Magnum
.45 LC
.45 ACP
Rifle:
.22LR
.223/5.56x45
.243 Win
.270 Win
7x57 Mauser
7mm Rem Mag.
.308 Win
.30-06 Govt.
.375 H&H Magnum
.45-70 Govt.
Obviously there will be others but this is a good place to start.
Do tell us what you think and why.
Randy