I've used the Savory Spice hickory smoke powder in snack sticks before. I ended up adding too much IMO. Back then there were no directions at all. Now the website says "1 ounce will flavor 35-50 pounds of meat". They also state it is great for rubs, sauces and sausage making. At least that gives some info.
1 ounce = 28.3495 grams
28.3495/50 = 0.57 grams per pound at the 50 pound ratio
28.3495/35 = 0.81 grams per pound at the 35 pound ratio
So their recommendation is between 0.6 and 0.8 grams per pound of meat. For a rub, I would go on the upper end of that scale, but for mixing within ground meat for sausage, I would go towards the lower end to start with. So a good gram scale is pretty much a must with this stuff. Mine will go to 1/100th a gram.
I do love their jalapeno powder. I would much rather use that than plain old cayenne as the jalapeno adds some flavor with the heat. If you have not tried jalapeno powder, I would recommend giving it a go (and I have only used the jalapeno from Savory Spice). Also if you have a local Savory Spice store near your, it is well worth a trip. The variety they stock on the shelf and the quality of the spice is amazing. The one in Atlanta had like 6 types of paprika when I was last there! Their prices are not bad either. They have small sample jars of everything and encourage you to smell and taste. They sell in small bottles and large containers, but will also bag up any amount in between. The bags they use are very thick and seal super tight. I think they keep the spices as fresh as in a vacuum jar if you roll all the air out before sealing the bag back (I was impressed with their bags and have not seen this type anywhere else). They sell a gazillion rubs and spice mixes and actually will make one to order from your recipe in small batches locally!
Photos from the Atlanta store a while back, and that is just one section of one wall: