Eutectic
Active Member
This is basically correct. Ian has given you a good answer already. My father shot a load he called the '300 Meter Load' back before the war (30's). They could get FA M-1 bullets or 'machine gun bullets' as they called them. 172grs with a long boattail. He loaded FA 70 primers and 36.4grs of Hivel #2. Maybe 2100fps or a little more...It was superbly accurate at 300. My Dad said groups at 200 yards were no better than 300 meters! And up to 150 he saw slightly oval holes... He told me the bullet went to sleep at 300. This was an '03 with 1 in 10" twist.In my mind this is the yaw dampening Ian referenced earlier. Is this a correct assumption?
Some relate yaw to a just spun top.... How it wobbles and then smooths out. Our so called normal yaw works like this (I think) But my father's example doesn't. It had help! The top would get worse and it would fall over in my father's case.
I call this help a 'compressed helix' and got into a quite lively discussion over on 'Cast Bullets' 7 or 8 years ago. Some may remember...
Pete