I use a lot of 844, 846 and 4895, even have a good supply of 414 locked away yet. At present my sources for 844 and 846 are drying up but there is still a ton of 4895 available for some reason. The only problem I've had with these powders, especially the 4895, is a much greater lot to lot variation in both bulk and burn rates. The key is when I buy, I get enough to make this a non issue for a few years. Although I have used a lot of pull down powder in the past it still makes me nervous, guess I'm just not a fan. All the noncanister powder i use these days is new.