Nice Shooting and I agree with you.
Outdoor lighting is usually much better than indoor.
"but" on the other hand indoor shooting lets you concentrate more on the target (straight line) there is little wind or cross wind to contend with. I personally would rather shoot outdoors on a range rather than indoors, and if you are shooting for distance then wind becomes a large factor in outdoor shooting.
My M-14 is a poor choice for an indoor range, rather I try to follow the shooting practices of the USMC and stay within the 300 yard to 500 yard distance, Which the M-14 excels.
Love,
Liz