[Kurn, son of Mogh]

Depends on position and the action before you. SSH suggests that if you are cold-calling a raise more often than 1/550 hands, you're doing it too much.

Thus, the best rule of thumb is to *never* cold call a raise. 3-bet or fold. Reraising or folding that 1/550 hand where a cold call is technically correct is a tiny error. Cold calling more frequently is a big error.