Well this is fraught with all kinds of scientific holes. Did he measure the powder loads with a scale rather than just trust the bushing? I spent a lot of time measuring powder throws with an RCBS digital scale, and sure enough I varied quite a bit as much as I tried to be consistent. Chamber length compared to the manual? Hull? Temperature? How many times have we run a chronograph on our loads and we "average them" because they vary so damn much. I think we need a heck of a lot more detail before we say Cheddite cause pressure spikes. That's just MY opinion and I'm pretty new at this but I'll say we need more evidence.
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