The statistical likelihood of Steph Curry's ridiculous shooting streak

The best 3-point shooters in the NBA hit around 40% of their attempts with Kyle Korver leading the way at nearly 50%. An oft-forgotten detail is that these numbers occur against NBA level defenses. What would these guys shoot under little or no pressure, ie what would they shoot in practice?

This is a hard number to get at since we don't generally have access to practice statistics of professional basketball players. However, there is some recent anecdotal evidence that we can use to give an estimate for one of NBA's best shooters, Stephen Curry. It was reported that Steph recently hit 77 3-pointers in a row and 94 out of 100 total. We're going to estimate his 3-point shooting percentage in two different ways: the easy, wrong way, and the not-so-easy right way.