The first thing that needs to be defined is “Muzzle Blast”. It can mean a few different things and they are mitigated differently through burn rate. They also can have different effects.
Are you talking muzzle pressure that will have a direct influence on recoil?
Or the volume of the report?
At a very basic level, faster powders will have less muzzle pressure, which may or may not be perceived (heard) blast. Loud Shot is a perfect example, it's a reasonably fast powder but also noisy.
If you have access to Quickload, what you start to see is a Higher peak pressure (faster powder) results in lower muzzle pressure. This is also why faster powders also start giving gas guns cycling issues.
Normally to achieve a certain velocity, a faster powder will use less total powder, and burn more of that charge. So if you have a 30 grain load burning 90% and a 40 grain load that burns 80% you have twice the unburned powder exiting the barrel. In that example you have added 5 grains of weight that will calculate into effective recoil, in addition to the likely higher muzzle pressure.
Smokeless powder burns more effectively under pressure, the higher the pressure the better the burn, the faster the bullet accelerates, the sharper the recoil, but the shorter the duration, and faster the dissipation.
Noise mitigation is a completely different problem. I use N120, 1680, Shooters World Blackout, CFE BLK, 5744 as examples because I have done a lot of testing with them. Depending on whose chart you use, they will change positions with each other. All have a noticeable difference in report volume and to my ear N120 is noticeably quieter. To my knowledge there is no way to see that difference on paper. You have to try.
A lot of good discussion came out in this thread. I used the same weight powder charge of 5744 and 2400 and a 325 grain bullet in a sub 9 pound 45/70. Some of my thinking changed doing this.
http://forum.accurateshooter.com/th...how-do-you-predict-or-measure-effect.3942898/
One other thing I am certain of, is that for every thing I know for certain when it comes to loading, there is an exception.