Wear your barrel down? - care to elaborate?

Norma's ammo, for years had steel jackets - no guilding metal cover, Winchester & Hornady for years used internal steel jackets in it's FMJ rounds with guilding metal outer jackets and I think Woodleigh FMJ's also have steel jackets covered in guilding metal. Seems nothing has changed to me with the newer ammo?

Due to the internal steel jacket's toughness and resistance to compression, I suspect they might increase pressure I
F the same load was used as a normal guilding metal jacketed bullet that weight, but the pressure will be regulated to normal with the load the company used.

As to wearing more severely, the steel core would have to be contacting the bore and particularly lands themselves AS IT MUST DO WITH NORMA ammo. The bore and lands with the Winchester Hornady and Woodleigh bullets are protected by the guilding metal covering them - so no measurable wear, I will assume, given no proof to the contrary.

Do Norma bullets wear barrels out prematurely - I don't think so, at lest I haven't not heard that. I understand their steel jackets do not have the thickness and tenacity of the inner steel jackets in the FMJ ammo, however smaller calibre rounds like Norma's are shot many hundreds of times more often than dangerous game ammo. I have heard of Norma ammo prematurely wearing barrels - have you? Maybe it does. I have some 180gr. steel jacketed Semi round nosed Boat Tails Normas loaded for testing in my #4 Enfield - I expect they will work perfectly and I am not concerned in the slightest over excessive barrel wear form their bare steel jackets.

Personally, I think this is one man's personal conjecture.

That makes more sense to me.