I am using a bit of the 410 powder now. Used a bit late last year and the shells loaded just fine. I also use 296 and have no trouble with that powder either. I do have some friends that load for the 410 using Mec progressive loaders and they all have trouble with the 296. Gets between the bar and the housing for the bar and binds up not allowing the bar to make a full stroke. Ends up not throwing a full charge if any powder at all. That can and does happen with any of the small ball type powders. Used to use Surplus WC830(we called it Magic) and it would mess up the Mec charge bars too. If Dillon only made the SL900 in 410...I would be a happy camper...as it is I use a Spolar loader in 410 and it loads them better than any 410 loader I have ever used..and no messing up with light or nonexistent powder charges. 410 isn't anywhere as bad as 296 and it makes for a really good load in the AA 410 hull. You can even get an actual 1/2 oz of shot in that case with 410 powder. Try it...you'll probably like it
