I've had a .25x45 for a while, and bought it knowing it wasn't going to be a commercial success. I wanted something to shoot components I already had around, in this case .223 brass and .257" bullets. There are better wildcats with the .257", as mentioned, but this was simple. I put together a 20" AR, bought some of their factory ammo to adjust my gas block to before reloading to match. I chronographed it with factory 87gr. Hot-Cor bullets that averaged 2977fps, though the high and low were 2932-3014fps. It's not a screamer, but that's right into .250 Savage performance out of a factory load with a 20" barrel, which isn't too shabby. It's not a bad cartridge within its design.