Variations of brass can cause problems when used with moon clips. I have had binding, and sticking in chambers problems with mine. Find a brand of brass that works well with your combination of moon clip and load. They can be a ball to shoot.
This is something often overlooked. It takes a while to sort things out - that is, find the best combination of brass and clip, but once that is done, the rest is easy.
OR....use the polymer moon clips from EZ Moon Clips...
Ez Moon Clips
I have found that the EZ Moon Clips are not fussy about the brand of brass and that they hold the cartridges rigidly, which makes for easy reloading.
The magic of the EZ Moon clip is the thickness - the "slots" for the cartridges are rebated (think rebated S&W cylinders), so the cartridge is not only supported by the extractor groove (which is the only interface with a metal moon clip), but the head of the cartridge is also surrounded, lending support. Here you can see the rebate...
Disclaimer: I do not have a 986, however, I shoot a 929 for both ICORE and USPSA and I use the EZ moons exclusively. The fact that they hold the cartridges rigidly and do not require any special tools to load and unload the clips makes them worth every penny. Pricewise they are usually far cheaper than the EDM wire-cut clips, but more than the die-cut clips.
Good luck with whatever you decide.
Adios,
Pizza Bob