[Stealth]

In my mind the only way to do proper range test is as follows:

1. Indoor range of 300ft.
2. A gun vice bolted to a really heavy table.
3. M16 platform for easy barrel and lower receiver swaps. Do a 300fps and a 400fps and throw in a 500fps - why not?
4. Identical barrels (prommy because they are well QCed and consistent)
5. Identical hop up units
6. Firing tests in semi-automatic and full-automatic;

For each hop up rubber you want to test, you build a barrel-hop up unit combo.

I can do #3,4,5 but have no access to #1 and 2.

If you want to go even more scientific, do n=3, meaning 3 Rhop barrels, 3 PDI, etc.

Given a choice I would want to do the following - rhop, PDI, flat hop, regular mound sleeves

John