I suspect the CorBon is that much hotter. I haven't used CorBon .357 110 grain, but have used, and chronographed, other CorBon ammo. It produced at least the velocities advertised, with only one exception that I can recall. Long time ago, I bought some CorBon .380 that was way short of the advertised velocity. When I contacted CorBon about it, I only had 5 rounds left. They asked me to send it to them for testing. They tested it, promptly called me back, and said I was right. Velocities were not up to spec, and this resulted from their using some new powder that did not produce the velocities intended. They didn't try to sugar coat it, or weasel out of it. They were very up front, and sent me two new boxes of their .380 ammo, that did perform as advertised. I understand CorBon is now under new ownership, but if their standards are up to what they were in past, I'd be confident their published specs are accurate.
BTW, I don't consider sealed bullet and primer to be marketing hype. Wish all my factory ammo was sealed in this fashion, like 9MM NATO, some Duty/SD type factory ammo for instance. Also, with .357 ammunition, I have found the nickel cases to be less likely to stick in a chamber that may not be glass smooth, like some Rugers I've owned for instance. This, due to nickel's lower coefficient of friction. Again, not hype...........ymmv
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NRA Life, COTEP 640
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