With a rem. short action you are kinda limited. The biggest you could proly go with is 243ai. That is if your gonna use the factory box mag. For a single shot you could proly go all the way up to 6x284. The only reason i say this is so you can have plenty of room to seat ur bullet out to the lands and it still feed right. The dasher to me is more appealing than the br, but i like the extra umph the 243ai packs. I've heard people push the 243ai to velocites over 3500fps with bullets up to 87gr. To me that is fast enough. your gonna burn alot of powder to acheive faster velocities outta other calibers. Just my 2 cents.
Last edited by j_22250; 01-18-2008 at 01:20 PM.