The AI cartridges have been discussed half to death. After all the posts about them it's hard to believe the misconceptions and flatout nonsense you still see when the subject comes up again. Mostly by people who don't shoot them and have no idea what they're talking about. A lot of these posts are just plain wrong. This is a good example.
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Extra time, extra dies, extra powder, extra bullets because the fire forming is pretty much a waste of a bullet, and not a lot of extra results. There a lot of people that swear by a AI gun but I never thought much of them.
Dies are unique, but loading time is the same. Fireforming the waste of a bullet? Are you nuts? Fireforming happens as a result of just shooting. Fireform velocities are somewhere about midway between the standard cartridge and the formed case, but sometimes more. They're extremely usable and accurate. Saying it's a waste is just plain wrong.
These cartridges all give faster velocities than the parent case. You can look at a case and pretty much tell if there'll be just some increase in velocity, or a lot. How much more depends on how much body taper the original case has, original shoulder angle to some extent, and bullet weight. Then, how well the loads have been worked up....some people just choose the wrong powder. But there WILL be an increase. People saying it's hardly anything simply don't know what they're talking about......you'll find they're also the ones who don't have them and pull their numbers from a reloading manual, or never spent time making one work. That's how it is.
