The most surprising aspect of the testing to me was the immense effect of primers on peak pressure and velocity. The 6mm Rem liked RWS 5333 magnum primers and gave the highest velocity with them. The 6/52 gave lower peak pressures but higher velocities with the very "soft" RWS 5341 primers. Pressures shot up with Winchester LRM primers to the point that the 6mm Rem primer pockets failed with loads that were acceptable with RWS primers. We did not test them on the 6mm/52 SMc.
The other surprise was the overall linearity of the test data. Pressure rise and velocity increases were almost exactly linear with increases in charge weight. This is unusual, to say the least, with my test experience.
I also learned that within the European community, smokeless powders are not considered double base unless they contain about 10% nitroglycerin. Thus Reloader and Norma powders qualify as "single base" whereas VihtaVuori N-500 series powders are "double base". The performance increase with VihtaVuori N-550 powder over Reloader 19 is noted on figure 12.
MOOSE HUNTING
Hunting in Europe is much different
than in the U.S. It is very formalized. Although I did not have this
sort of experience when I had previously hunted in Spain, that experience
may have been set up for American hunters. In Sweden you have to pass
a shooting test at 100 meters at a running moose, be authorized to
own or borrow a gun, hunt with a group and have a hunting license.