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This sounds like an extremely interesting cartridge and I know it is made from the 8mm Rem. Mag. case but just what steps are involved in in forming .358 brass from 8mm Mag. brass? Also, is there anything beltless out there that resembles the STA's performance? It can be a wildcat, factory, or proprietary cartridge. However it should be at least a .338 and no larger than .375. Thanks in advance for input. | ||
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Seamus, When I had 358 STAs I fireformed necked down 375 H&H cases and also necked up 340 Wbys. Necking up 8mm Rems would also be easy. Actually, the 358 STA is an Improved 8mm Rem case. In my opinion the 338 Ultra would be a better round and for th3 same reasons that the Remington shortened the 300 by about .1" to make 338 Ultra. Some of the 358 bullets like the 250 Hornady Spire Point, have too much length in front of the cannelure so that when stuck in a 375 necked down, the overall lenght is longer than the 3.6" magazine of the Model 70. Also, the 338 Ultra necked up would eliminate the need for any fireforming and would be a bit faster, but not by much. But unless you want to play about with lots of different groove diameter barrels and twist rates or use pistol bullets and so on, I think the 338 Ultra is probably the way to go. One neat thing about 35 bore size and I am assuming America is the same as Australia here, we have 35 barrels in .356, .357 and .358. Undesize barrels like .357 seem to better with Barnes X bullets. Mike | |||
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