I'm looking to buy a springfield M1A but someone tell me i would not be able to shoot hunting ammo ( hot load). Is this true ?
And if we put the weight of the rifle aside, is this a good rifle for hunting
Your buddy probably thought you mean the M1 Garand which will certainly not tolerate modern ammo without some work to the gas system.
The Chinese piston outer diameters are chromed because the piston itself is carbon steel, not stainless like a USGI one, as they wanted to add some wear and corrosion resistance. It would be difficult to machine the NM groove mods into a Chinese piston without flaking off pieces of the chrome coating on other parts of the piston's outer diameter.
Personally, I would not attempt it unless a client was willing to assume the risk of ruining the part, and I DO have the right machine tools.