I have an A-Square Hannibel in .416 Rigby. Synthetic stock and teflon covered stainless all weather package. Pretty good rifle and design. Forward mount scout style scope. Accurate and comfortable to shoot. I do wack my thump on the bolt if I'm not careful. Overall, I'd say technically very good; asthetically just a bit crude around the edges. Still, I would buy another. Took two years to make because Art had a bit of political trouble.
I believe the .495 A-square is an excellant cartridge. I cannot fault your choice of rifle or caliber.
But I would like to ask rhetorically "How much gun can I shoot accurately, consistently, from the hunting positions that I use. I guess I fall into the "Use Enough Gun (but not more than I can handle)" argument. I developed a pretty good flinch shooting a .416 Rigby. In shooting I gradually forgot the purpose was not just to survive another shot but to actually hit something. My flinching cost me a Zebra in Namibia. I worked on cureing myself at Gunsite, and am still suseptable to flinching in the quick shooting situations that are African hunting.
So my long winded point is if I could shoot a .495 A-Square comfortably,consistently, accurately and without flinch in hunting environments then I would feel better about recommending one to you.
Westley Richards