Re: Feeding .260 in AI mag?
I feed them into my Rem 700, which started out as a 308 and is now rebarreled to 260. It has AICS magazine. The longest round that will feed reliably is about 2.88". The Berger 140's hit my lands at 2.85" and I load mine 2.84".
So long as the round is less than 2.88" it should feed ok. The AW mags are longer, but you have to have a reciever that will take the longer rounds. It's not just the magazine.