IMHO, this gas check variance is more about the bullet and mold. When you find a GC that properly fits a bullet, it's gonna stay on whether it has a hornady edge or teeth like a gator. With the many molds I'd had over the years, there have been a few I've struggled with, either finding a GC that fits, or reforming the check, or annealing it, or just learning a technique to cast the bullet so the shank is a wee bit smaller to fit the GC I wanted to use.
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Then there is the mold that was cut incorrectly, ie, I've bought 4 different NOE mold designs for fat 6.5mm, 3 of them had different shank sizes. My biggest struggle with them, was a standard 6.5 was too small to size .269 or .270 I've had about a dozen samples made by two different small time manufacturers ...different material thicknesses and formed with different dies. Two of those molds would work with one GC and the other two molds struggled with two different samples...most of the samples wouldn't work at all.