I feel the urge to drop in on a friend who is being abused.
Why do you think you need to check on them?
As their local friend I believe I have the responsibility to step in.
It is good to make sure your friends are safe and to support them. Make sure you are also safe when you drop in on them, as you don't want to put yourself or them in any further danger.
I'll just go swallow a few bullets, who cares.
That is really good of you! If you think there is a real danger of physical harm you should call the police to help you.