For the reasons elpac3 noted in the second paragraph of Post #2, no.

As elpac3 noted in the third paragraph of Post #2, proper load development is to begin with the starting load and increase the charge incrementally until you see signs that you are near (or have exceeded) maximum. One of these signs may be where you increase the charge by 0.2 or 0.3 grains and see little if any change in velocity.

As you work your way up from the starting load, but before you start to approach maximum, you may find the changes are close to linear, but they cannot be trusted to stay that way across the entire load and there is no sure way to predict when the "curve" will start having dramatic changes.