[palmer]

$200 billion in T-Bills added to reserves somehow creates $1 trillion in deposits.

It does (2T or more), but in the banking system as a whole, not in one bank. The 10% reserve requirement is lowered in special cases (which I would think there are more of at the moment).

[Toddsterpatriot]

$200 billion in T-Bills added to reserves somehow creates $1 trillion in deposits.

It does (2T or more), but in the banking system as a whole, not in one bank.

No, it doesn't. If the Fed bought $200 billion in T-Bills, the new cash added to the system would end up adding $2 trillion (use a different multiplier if you want to) to the money supply.

The debt swap doesn't have the same impact as new cash.