You asked about Varget, there are several things to know:
1. It is not overly sensitive to temperature changes. Some powders will have velocity and pressure differences based on changing ambient temperatures. Varget is not that way. It seems to maintain a constant velocity over a wide range of temperatures.

2. There have been some issues with inconsistency in different lots. (One lot may give a different velocity than another lot.) The way around this is to buy in bulk. Buy an 8 pound container and you dont have to worry about it for a longer time. This lot to lot variance may be a thing of the past, but it is not something to ignore if you have a different POI when using a fresh container of powder.

I like varget as a "go to" powder.

Sean