Ralf
Excuse but what does your question have to do with a test of 3 different twist barrels? Absolutely nothing. Yes they are probably different with 4 different burning ratesd to the same velocity. What the heck is your point. My test was the same load to the same pressure to the same velocity. I tested the difference that RPM makes. The test demonstrates it is RPM. Please come back with a more pertinant question or quit wasting my time with rediculous comparisons that are not valid.
Read the test Ralf, I am seriously thinking you have not done that.
Larry Gibson