You can. But like Retaks said, you'd be better served with a more open choke. I am assuming you have a smooth bore and not a rifled bore based on the mod. choke. I've found the saboted slugs aren't the best in, at least my 870. I've tried several different brands of slugs both saboted and rifled. The most accurate out of mine is the Federal Tru-ball slugs. Try different brands and see what works best for you.