Guard, reserve troops get fewer veterans disability claims approved

Not at all surprised.

With AD, any documented injury during your service, is presumed to be service connected, unless there is a LoD showing otherwise. Broken ankle on the basketball court on Saturday? That was just physical fitness maintenance - part of duty.
With Part-timers, there is an added requirement to prove service connection. Technically AD requires proof of service connection, too. But, as above, there is a presumption of connection based on injury occurring during service dates. (For future onset of illness, like Agent Orange or Burn Pit claims, that is a different story.)

If you are drilling one weekend a month, the baseline assumption is that the injury occurred on one of the other 28 days, unless there is medical documentation or a LoD that proves otherwise.

I am in no way trying to say that part-timers are trying to game the system, and claiming non-service injuries as service connected. Just that it is a lot harder to convincably PROVE that service connection.

This is wrong especially with the extended active duty time and deployments they have.

Tell me about it, and when you retire, if you are rated under 50% they take your VA disability out of your retirement check, Not sure if this happens to active duty, I would like to know????