[sergiotapia]

not a gun dude, but I read that it is common when using "subsonic rounds" for quieter shots.

[jerlam]

All of this seems to indicate this was a hired professional and not someone merely angry at their health insurance benefits.

[throwaway48476]

'hired professionals' are always FBI agents. This guy didn't even do a test firing.

[brokenmachine]

What does this mean? How do you know he didn't test before?

[throwaway48476]

If he knew what he was doing he'd use a lighter spring.

[brokenmachine]

Sometimes you need to use what you have on hand. He seemed quite prepared to manually cycle the pistol.

You may question his methods, but you can't question his effectiveness.

[Zigurd]

Or someone highly motivated to make the hit a work of art. Killers are usually not very smart, or they are blinded by rage, and they make mistakes and are sloppy and incomplete about planning.