No. A lot of people think that because an AI chamber can accept and fire factory cartridges, it has the "same headspace", and can use the same gauges. This is not the case.kciH said:The upside is that the AI cartridges are supposed to use standard headspace guages.
No. Headspace differences of as little as .020" are dangerous and not readily apparent to the human eye. Compounding the problem is the difficulties of visually compairing compound angles side by side. We do not want to deal with the dangers of 60,000 PSI gas blowing out on the next firing.kciH said:Take a full length sized casing that has been formed previously and compare it to a fireformed casing that has not been sized. If you you have a headspace problem it will likely be visible when the two cartridges are set side by side on a level surface.
I really don't know what you are talking about here. The mid-shoulder headspace point of an AI formed cartridge is higher than that of a factory parent cartridge. The neck/shoulder junction is nearly the same, usually shorter by the crush difference of .003"-.004".kciH said:The shoulder brass typically comes form the shorter shoulder itself. Ackley Imporved cartridges are not intended to be shorter than the predeccesor. They are the same lngth typically and often have a LONGER neck than the original.
Possibly. Or, it could be the result of proper fireforming in a good AI chamber, where the brass that fills the shoulder is drawn down from the neck, not up from the body above the web. Either way, you don't know if it is a good fireformed case until:kciH said:The thing that would cause a short neck in my opinion would be a long chamber, which woud cause you to have excess headspace in relation to your cartridges, as was mentioned by Hangfirew8.