My Keltec KS7 before & after!

I got the Aguilas for practice. I got the Federal Shorty 1oz slugs for serious use if that's the way I decide to go. The Federal Shorty is still a 1 ounce chunk of lead traveling at around 1200fps. That, by the way, is the same slug and advertised velocity as their 2.75 inch shell. How is that inadequate?

Terry