I have a Mossberg 930 SPX 8 shot 12 gauge. I load it with Express 00 Buck and I have 1 oz slugs on the buttstock. The Mossberg is very reliable and shoots any load once broken in. 00, slug and even target/birdshot. However, I also have an FN Police Tactical and a Saiga 12 Tactical coming. What type of shotgun(s) do you have?