Dec 23, 2020 · A rifled slug (shot from a smoothbore gun) produces a lobbing angle of trajectory. When shot from a 12-gauge, these slugs can travel upward of 1500 fps. Oddly enough, rifled slugs are not recommended to be shot from a rifled barrel, as some in the ballistics community have raised concerns over lead fouling that can build up in the grooves.
The .410 is an admirable weapon for many duties, but when it comes to deer, give me a 20 or a 12 gauge every time. If you insist on using a .410 shotgun as your deer hunting shotgun, then I’d advise you to buy some high-quality, high-velocity ammunition. There are a lot of different companies out there that make .410 shells.