But what about Bornico p226 worth $400?
If you are asking if a Norinco 226 clone in .40 S&W called NP58, is worth $400, I'd say that is what a new one cost when Canadaammo and Marstar had them in stock, after taxes and shipping. I got mine at a trade value of 350 give or take, 50 shots old with one mag.
How many mags does it come with? They use the same as Sigs but cost around 45 - 54 bucks from other suppliers, see other CGN sponsors. Canadaammo and Marstar do not have mags in stock.
I shoot my own reloads, 4.7 grains Titegroup under 180 grain flat nose bullets cast from wheel weights by a shooting buddy using a Lee single groove but lubed with XLox (similar to Lee Alox). This load is the maximum and should deliver 980 fps muzzle velocity. I haven't chrono'd this load yet.
No functioning problems at all, but accuracy has not been tested. At 7 meters, I get around 2 inch groups but I am a lousy shot. It is a fun gun to shoot.
The NP58 has an aluminum frame so it may not survive your ammo as well.
Your Norkie 1911 may be fine now but the truth is even 1911s are not designed to shoot excessive pressure ammo. The 45 acp is a low to moderate pressure round.
Post some pictures of your spent .40 casings. Take different angle shots of the head showing the primer and the pin indentation, the side of the casing showing bulges if any.
We can try to estimate if you are indeed shooting excessively high pressure ammo from the condition of the spent casings.