Monte,I have two of them, but mine are the less expensive 320 S/N's - I only have the glass stock - none of the fancy wood.
They both shoot extremly well, most any bullet you can get down the barrel. Beware they are a big gun - I guess I mean they are long. The receiver thay use is really long and with the 26" barrel they are really long. I always feel like the balance isn't quite right when i am carrying it around, but when it comes time to put it up it really is comfortable and fits great.
Here is a target I shot awhile back with one of them. I was trying some .458 (45/70) caliber bullets in a new MMP sabot. First time I had used this load.
http://img.photobucket.com/albums/v130/sabotloader/458.jpgTo be honest with you if I had my choice of any ML's out there I think I would still take a plain old Remington M700 SS. But I will not give up my A&H though. I still use it for early season hunting (during regular rifle season). I have a lot of confidence in it.
Mechanically it is a good gun - adjustable trigger, easy bolt disassembly and etc. And for me it is really fun to shoot.
Here is the web site if you have not been there. I think you can call the 800 number and ask to speak to Ray Crow, he is a company rep and a really good source of information on that gun.
http://www.austinhalleck.com/Hope some of this helps.