I have a Mossberg 835 and because it is meant for steel shot not supposed to use slugs so of course never have or never will. I have contacted Mossberg about using buckshot and they have said that it was safe to use. Now I'm assuming that it is safe to use any type of buckshot as it does not put the same type of pressure on the inside of the barrel like a slug would. I have a modified choke as I use it mostly for upland hunting. So I'm assuming that 000 Buck would probably give me an effective range to about 40 to 50 yards. Am I right?