This swaging of bullets has caught my attention lately. In concept, one would like the center of gravity to be as close to center to the geometric shape as possible. Is that correct? Tail heavy bullets would seem to require more twist than nose heavy. Nose heavy would tend to wobble as opposed to tumble with tail heavy bullets. Thats kind of how I picture it in my mind. So, if this is the case, why do we do so much trial and error when it comes to making bullets? Couldn't we just design a bullet and find the Center of gravity, then adjust shape until the bullet is ZEN? This brings up spherical shot. It should be the perfect CG projectile, yet it doesn't perform optimally. Any body have any enlightenment?
Regardless of how well the bullet performs, pushing it supersonic using air is very inefficient.... Experimenting with different weight bullets in a powerful PCP will quickly show you the increase in available FPE using heavy projectiles kept below about Mach 0.85.... and the increase in efficiency while achieving that additional power.... Bob[/quoteyes,I love your quick formula of 2 ft lbs per grain]
I love your quick formula of 2 ft lbs per grain
Quote from: Bill G on September 21, 2014, 09:43:08 AMThis swaging of bullets has caught my attention lately. In concept, one would like the center of gravity to be as close to center to the geometric shape as possible. Is that correct? Tail heavy bullets would seem to require more twist than nose heavy. Nose heavy would tend to wobble as opposed to tumble with tail heavy bullets. Thats kind of how I picture it in my mind. So, if this is the case, why do we do so much trial and error when it comes to making bullets? Couldn't we just design a bullet and find the Center of gravity, then adjust shape until the bullet is ZEN? This brings up spherical shot. It should be the perfect CG projectile, yet it doesn't perform optimally. Any body have any enlightenment? r.b. is not spinning, no stabilization from spinning,like a football.the more off center the c.g. is the more it is affected by how much spin