I've been loading 7/8 oz in the Windjammer II yellow wads for several years. They work fine in STS hulls and even better in AA's. The STS will dish the crimps a bit, but not enough to be concerned about. I have my MEC adjusted for a perfect STS hull so I get the AA's just a bit compressed.
I'm also a fan of the Downrange green 1 oz wad, but I haven't been able to make them work well for 7/8. I haven't tried their new wad. I have trouble getting Downrange locally. The WJII's are everywhere, and I can use them for both 7/8 & 1 oz.
jbmOU; Its the Downrange DRXXL wad in shocking pink. I use them in Rem. hulls and with 17.5 Clays in a MEC Grabber they crimp fine and shoot well. If the price of components keeps rising I will see how they work with a 3/4 oz. load soon. Good luck.