Re: 270 AI
It is not as simple as that. Factory 270 win ammo can be fired in a 270AI chamber, but I believe that there would be excessive case stretching in the case head/web area. This could result in case rupture after one or a few reloads. If you look in the Nosler reloading manual in the 280AI or 3006AI data, I believe they describe how to properly fireform cases. You can probably find some info on this site, or maybe someone can post a link for you. I have a 3006AI. Case forming is not difficult, but needs to be done properly.
The critters have to win every time, I only have to win once.
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