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The Basics, Starting Out
My thoughts on solid copper bullets and in comparison to other bullet types.
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<blockquote data-quote="Petey308" data-source="post: 2328845" data-attributes="member: 106845"><p>Brittle will mean pieces breaking/fracturing off and simply leaving a shank to pencil through. Wide wounding and massive hydraulic forces come from a wide frontal area to displace a high amount of tissue and fluids. Pieces that break off are going to help shed weight and reduce sectional density and transfer more energy into the animal, but depending on how much wounding those pieces do alone, there still might not be a great deal of overall trauma, especially with a less than ideal shot placement. </p><p></p><p>What I picture as an optimal design would be something more brittle at the nose/ogive with a large cavity and/or slots to initiate immediate expansion, then they'd breakaway, but leave a softer, more malleable, material on the shank with its own method to still mushroom to create a wider frontal area as it continues to penetrate and displace tissue and fluids. This is what a good cup and core bullet does though, so I'm still not sure how you combine harder and softer lead free metal like that. </p><p></p><p>Perhaps a better method would be to use the DRT technology of compressed copper powder and solid copper together. They use the copper powder as their entire core with a thin copper jacket swaged over it. Their version just like that actually works great on its own, but perhaps with some testing, you could make something similar to the Federal TLR bullets that have a solid copper base but a lead core in the ogive. Instead of lead, you'd have the compressed copper powder. Or, make it similar to a Partition or A-frame where it has the compressed copper powder in two separate compartments- one in the ogives and one in the base (rather than lead). That way it still works in two stages like the Partitions and A-frames. The issues you want to get right though would be balancing the weight of the bullet and getting the density right. You can do all these great things to make it perform excellent terminally, but if it doesn't have good external ballistics and flies through the air unstable it's simply not going to perform well overall. There would be lots of hurdles and trials to overcome, I'm sure.</p><p></p><p>It would be extremely fun to experiment with, for sure.</p></blockquote><p></p>
[QUOTE="Petey308, post: 2328845, member: 106845"] Brittle will mean pieces breaking/fracturing off and simply leaving a shank to pencil through. Wide wounding and massive hydraulic forces come from a wide frontal area to displace a high amount of tissue and fluids. Pieces that break off are going to help shed weight and reduce sectional density and transfer more energy into the animal, but depending on how much wounding those pieces do alone, there still might not be a great deal of overall trauma, especially with a less than ideal shot placement. What I picture as an optimal design would be something more brittle at the nose/ogive with a large cavity and/or slots to initiate immediate expansion, then they’d breakaway, but leave a softer, more malleable, material on the shank with its own method to still mushroom to create a wider frontal area as it continues to penetrate and displace tissue and fluids. This is what a good cup and core bullet does though, so I’m still not sure how you combine harder and softer lead free metal like that. Perhaps a better method would be to use the DRT technology of compressed copper powder and solid copper together. They use the copper powder as their entire core with a thin copper jacket swaged over it. Their version just like that actually works great on its own, but perhaps with some testing, you could make something similar to the Federal TLR bullets that have a solid copper base but a lead core in the ogive. Instead of lead, you’d have the compressed copper powder. Or, make it similar to a Partition or A-frame where it has the compressed copper powder in two separate compartments- one in the ogives and one in the base (rather than lead). That way it still works in two stages like the Partitions and A-frames. The issues you want to get right though would be balancing the weight of the bullet and getting the density right. You can do all these great things to make it perform excellent terminally, but if it doesn’t have good external ballistics and flies through the air unstable it’s simply not going to perform well overall. There would be lots of hurdles and trials to overcome, I’m sure. It would be extremely fun to experiment with, for sure. [/QUOTE]
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The Basics, Starting Out
My thoughts on solid copper bullets and in comparison to other bullet types.
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