Wondering if you guys might be able to help me out? I'm loading Remington Nitro 27 hulls with 15.5 gr. of Alliant E3 powder and one ounce of shot. With a DownRange Spolar 1 oz. wad, the crimp is caving in. Zero wad pressure. I tried a Downrange XL1 green wad and experienced the same issue, caved in crimp. Then I tried a Claybuster 7/8 oz. wad (CB0178) and it causes the crimps to swell out. Do you guys have a recommendation on a wad that falls somewhere in the middle on stack heighth?