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I have a .30 Newton in my Cartridge Collection and it is a Beltless round. The .35 Newton is the 30 necked up and it also is beltless.
There is a belted round based on the .338 Mag and came out even before the .300 Win. Mag. It is the .308 Norma Mag. It is also refered to as the ‘.30-.338 Win. Mag.’ Winchester did not like them using there case and beating them to a .30 cal mag. so they took the .338 and moved the neck forward to get a little more powder in it to get higher velocity hence born the .300 Win. Mag. We all know shooters are velocity crazy so the .300 Win. Mag became the popular choice. Some competition shooters use the .30-.338 because it has a longer neck. It is the cartridge that Winchester was going to make if Norma did not beat them to the punch.
I think Trapper L is thinking of the .308 Noram Mag and is defiantly belted and referred to as the .30-.338 Win mag.
Good luck finding Ammo for it and I do nto know if any other cartridge can be used to make one.
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