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GSR +  Blog 2 Sub-Sonic Ammo What is sub-sonic ammo and why is it needed? We will need to look at a few things to understand the practical application. First, anything accelerating to over the speed of sound will create a sonic boom.  This includes rockets, jet plans, the occasional car and of more interest to us, bullets.      According to our friends at Wikipedia and my high school physics book.  (yes, I’m one of those geeks who kept his physics textbook.)       At 32° F th

Hello students and all interested in improving your firearms safety and proficiency. In April I traveled to Arizona to visit some friends and participate in an IDPA (International Defensive Pistol Association), level 1 shooting match.