By the way, I fired about 50 of those Aguila Colibris from my Ruger Bearcat yesterday. I live in a rural area. I was at a friends house. He has a little range set up in his backyard. He put a small addition on his house for a hot tub and he stands inside this additon and shoots out the door. The closest house to him is about 50 yards in the opposite direction of where we were shooting. Our goal was to see if we felt the closest neighbor would be able to tell he was shooting. The targets were about 40 yards away. We were playing around with Aguila Colibri, Aguila Super Colibri, Aguila SniperSubSonic, and CCI CB Caps. We shot them out of a bolt action rifle and out of my pistol. The goal was to see which ones were the quietest and compare that to the performance. I chronoed them out of the rifle. I can't give you exact figures but the Colibri were about 270 fps, the Super Colibri were about 375, the SSS was about 580, and the CB Caps were in the 700 range. We found that out of the rifle, the CB Caps didn't seem to be much louder than the rest of them and offered significantly better perfromance. They were definitely louder, but we didn't feel they were loud enough that someone would be calling the police for shots fired. None really sounded like something that would be associated with a gun shot out of the rifle. By performance, I mean trajectory. The Colibris dropped like a rock when trying to shoot at 40 yards. They were hitting the ground like 10 feet in front of the target. I shot a wooden stake with a Colibri and it bounced off and hit my pant leg. It didn't even move the material of my jeans enough for the bullet to hit my leg. It just fell on the ground and was not deformed at all. Out of the pistol, I considered all of them to be too loud. Standing outside the house around the corner from the door, they all sounded like being in a gun store with an indoor range; The sound you hear when you are in the store, and not in the range. I decided that none of these rounds were practical for what I wanted to do (shoot without the neighbors hearing it). An air rifle would provide much higher velocity, produce less noise, and if someone saw you, theyou wouldn't be as upset about firing a pellet rifle.