16 gauge reloading is a challenge. But at least--other than a really good hull--there are better components out there. Especially wads for loads lighter than 1 ounce. Used to be we had to use filler.

There is a 16ga reloaders group with a lot of data.

I have reliable 7/8 oz recipes using the black Rem hull with Unique powder and the Claybuster wad, as well as Herters hulls, 20/28 powder, and the DR-16 wad (although those wads are hard to find currently).