TC1
I didnt test the two you mentioned, but the 300 RUM , I tested with H870 and H4895. Same results as a 308 or 223 or any others. In my opinion and testing, modern smokeless gunpowder burns like modern smokeless gunpowder. No amount of case shape, advertising, endorsements, etc, has any effect. Dont take that as the gospel, thats just what the chronograph and strain gages tell me.
Charlie
Thanks Charlie, it's alway's been a theory of mine that 99% of the powder in a cartridge is consumed in the first 1" of the barrel anyway and the rest of the barrel is only a means for the pressure created in the first inch to react on the bullet. I've been taken to task for this several times but still think I'm right about it.
Terry
