[RAMMAC]

Nope.

Typically, you won't find another powder from the same manufacturer that performs the same. On the other hand, it's usually fairly easy to find a powder from a different manufacturer that will perform very similarly.

 

[Shortbox4x4]

Even one or two steps different in the powder the burn rate is different. Which affects pressure. You cannot go by velocity in most cases. A faster burning powder might need a lesser powder charge and you might get the same velocities and you might not.

We make ammunition test barrels and bullet/ammo/powder manufacturers use the test barrels to develop loads for reloading data and for box ammo for a reason.

Don’t guess at loads….use a loading manual etc…

Also burn rates not only effect pressures but in regards to a gas operated weapon can effect how the weapon will function. Good or bad.

There are a lot of variables.

 

[SP155]

I presented this because it seemed that with 168 grain SMK bullets the sweet spot for repeatable accuracy generally was reported back as 2600 FPS ± with a variety of powders . That's all. No further head scratching required.