Doesn't matter. If you don't have a chrono, you will have no idea what it is doing in your rifle. Work up a load that shoots good and use it. Shoot at distance to get your drops for that load and shoot. When you get to the upper pressure limit with the load, it doesn't really matter how fast it is. If you are using a reasonable powder, (look at the available data), you will be fast A chrono is nice, but not neccesary.