The shorter length is not due to the case maker or brand. When you form into an improved version of a cartridge, the extra brass that flows to the shoulder area and case walls has to come from somewhere, and it takes the path of least resistance, therefore it will always scavenge brass from the neck, leaving the neck slightly short. .015" is not an issue, and will happen with ANY wildcat. When forming for wildcats, you always have to take into consideration that extra .015" to .020" shortening in neck length. Some wildcats that use full-length SAAMI cartridges, this will happen every time, provide the brass was cut and trimmed to SAAMI spec parent cartridge lengths to begin with, and there's nothing we can do about it. It's very common knowledge amongst wildcatters. That .015" should not cause an issue, and you will get the same issue regardless of brand of brass.
