I checked it out in brief. I like RSI shooting lab. They have a 30 day demo. This program, one can input more criteria. I usually sight in on a PBR method, ranging from 3-6", depending on cartridge and application.
But with any ballistics program, knowing what the velocity and BC. , factory or otherwise, is critical. For an accurate program run. But one can estimate, for comparative results. It appeared the OT was set up for factory rounds, which is fine. But I wouldn't take it for granted. As velocity in factory ammo, can vary from one rifle to the next. But then programs aren't meant to replace shooting practice either.
