A second criterion I didn't mention in the video was size. While the size of some of the chronographs allows for the measurement of larger ammunition, You need to consider more space when setting them up. You will need more space to transport. You also will need a little more setup time when using them in the field.
I recently did a search and found a couple of airsoft chronographs that looked like they'd possibly fit the bill. Acetech was nice enough to send us some to review. Check it out:
Something else I didn't get to in the video was the quick fulfillment. Sometime folks worry about ordering from overseas because shipping can be quite a harrowing ordeal and/or very costly. Well Acetech has their products distributed to fulfillment centers in the US, so I only waiting a few days for the package to arrive after they decided to send it. So there's no concern on that end of things!
As mentioned in the video, there does seem to be some inconsistency due to things like big ammo through an airsoft chronograph. There's also a chance to hit the sides of the chamber due to the size of the rounds versus the size of the testing chamber.
If you're considering getting an Acetech Chronograph. You can check them out through my affiliate links here; AC5000 and AC6000.