Howdy
Here is some of what I have learned in over 20 years of loading Black Powder into 45 Colt, 45 Schofield, 44-40, 44 Russian, and 38-40.
The correct amount of powder in your loads will be that amount which is compressed between 1/16" and 1/8" when the bullet is seated. This will of course depend on how deep your bullet is seated.
Here is one way to determine that. Make a little ruler like this. Line up the tip of the ruler with the crimp groove and make a mark at the base of the bullet.
The correct amount of powder will be around 1/16" to 1/8" over the base of the little ruler.
Here is another way. Measure the distance from the crimp groove to the base of the bullet with a caliper.
Make a scratch on the case with the caliper representing the base of the bullet. Fill the case to 1/16" to 1/8" above the line. You can eyeball it.
Note: Not all Black Powder weighs the same, so saying 30-35 grains is kind of misleading. Contrary to what many think, yes, you can weigh out your charge. As I said, the correct charge will depend on how deep your particular bullet seats. Yes, contrary to popular belief, compressing the powder with the base of the bullet is not a problem, I have been doing it for years.
Here is a chart I made up many years ago showing my favorite loads with various powders. Note they do not all weigh the same. Not all of them are still available. The 2.2CC charge is what I use in both 45 Colt and 44-44 with the Big Lube bullets pictured above. These days I pretty much stick to Schuetzen FFg. As you can see, my 45 Colt and 44-40 charge is about 33.3 grains of Schuetzen FFg.
Here is one way to get your powder into your cases. That is a dipper from the Lee dipper set.
Or, you can go big time like I do, loading my Black powder cartridges on my Hornady Lock & Load AP progressive press, with a Lyman Black Powder measure mounted on it.
Forget about adding wads inside the cartridge.
The purpose of lubing your bullets is to keep the fouling in the bore soft. With regular modern bullet lube the fouling turns into a hard, difficult to remove crust that quickly destroys accuracy.
Black Powder compatible bullet lube is 'soft and gooey'. As each bullet runs down the bore it wipes away the fouling left behind by the previous bullet, and leaves behind a coating of soft lube. the process then gets repeated with each shot.
The Big Lube 250 grain bullet pictured above carries a huge amount of soft, gooey Black Powder compatible bullet lube.
I used to pan lube my bullets for years before I discovered the Big Lube bullets. My experience was that the skimpy lube groove in modern bullets carried enough BP compatible lube to keep the bore of a revolver lubed OK, but in a rifle the bullets 'ran out' of lube about six inches from the muzzle. I had to swab out my rifle barrels frequently to keep good accuracy. This problem went away when I discovered Big Lube bullets.
I used to pan lube my bullets with a mixture of about 50/50 beeswax and Crisco.
Yes, SPG is one of the best BP lubes on the market. If pan lubing you can melt the standard lube out of the bullets in a warm oven. Lay the bullets on their sides on a cookie sheet covered with paper towels. Set the heat for the lowest level. After about 20 minutes the lube will be mostly wicked out of the lube grooves, if a little bit is left it does not matter.
By the way, notice in the photos above how little lube is in the lube groove of the pan lubed bullets, as opposed to the lube in my Big Lube bullets.
By the way, there is nothing economical about shooting Black Powder in cartridges. If you put 35 grains of powder into a case, you will only get 200 rounds our of a pound of powder. Compare that to my typical Smokeless load of 7.5 grains of Unique. You can do the math at today's prices.