Well, as Ayers pointed out, most 410s are full choked. I've fired 12 and 20ga slugs from choked barrels up to improved modified, so I'd cautiously hazard a guess that it might be safe to do so from a modern 410 of good construction, in good repair, that has been looked over by a gunsmith. (Yes, I'm covering my tailfeathers here.) It's just an issue of finding rifled slugs in .410, and I don't think I've seen them in any catalogs for years. There are ways of improving slugs, but I won't go into them here for legal reasons, and they do a LOT of meat damage (think a big Glaser).<br><br>For what purpose are you thinking of using the 410? The slugs, in my experince, are horrible. I tried using them once, and that is the only deer that I've shot that didn't drop within 20 feet of where it had been when I hit it, and it was a text book placement. <br><br>A lot of 410s can be configured to fire the .45 Colt round, which has a much better rep on medium game, but you get into legal issues that may interfere with the effectiveness of the already paltry shot charge. T/C get around it by using a screw-in extra-full choke, but I've seen pictures of the results of accidentally forgetting to remove that before firing a solid slug, and it wasn't pretty. <br><br>I'm not sure if they are available, but the possiblity of adapters for, say, .223 having beenmade does exist dimensionally. Only problem is that .410 has such low chamber pressures that it may not be safe to make them. .223 is pretty low pressure, as is .30-30 (which is better on deer, I'm just not sure if it is dimesionally compatable).<br><br>Honestly, IMHO, the 410 is an expert's small game weapon, becuase of how little payload involved, or a point-blank absolute last ditch personal defense item from a boot gun. It's best use may be as a trade in for an inexpensive break action rifle, like the H&R Handi-gun. (It isn't a Contender or and Encore, but you can find them for not much more than the cost of a carbine-length Contender barrel.) I'm rather fond of the .357 mag for that purpose, up to small-medium game, and .44 mag for medium-large game. <br><br>If anyone knows of someone who makes a .454 Cusell barrel for the H&R Handi-gun, I would drop the cash for that in a heartbeat, becuase that is perfectly suitable for medium deer and will discourage a bear, while lower pressure .45 Colt loads are suitable down to rabbit. Just need to keep which loading is which straight. <br><br>Another idea would be a repeating .22, like any of the 10/22 clones (AMT made a good one, that was cheaper than dirt and looked to be pretty well made, never fired it), or those of the little Browning, which breaks down into a package not much bigger around than your forearm, and about as long.