I had a full tilt 577 3" and I can tell you it is a awesome cart, but at almost 14lbs was a pain in the ass (more like arms).

I think the 577 2 3/4 would be an awesome round built at 10 to 10.5 lbs with GS custom 640 grain at 1850 to 1900 fps. Would still wack you a bit, but I'd bet it would be death on anything shot with it. I would like a modern double in this caliber priced in the 450-470 class price. If Butch would build a double with a rigby style forend lever for about 12-15K he would get an order form me. I dont think he intrested though!

Ed