Need For Faster Twist
#21
I don't have a CAD program though or the software to estimate stability or BC. Having them design it increases the cost untl R&D has been paid. Another option is...can the Lehigh 215 CF be made from copper instead of brass. In copper it should be very close to 220gr.
#22
Nontypical Buck
Joined: Mar 2009
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From: Saxonburg Pa
#23
The CEB 240gr ML bullet is copper. Many of their other bullets are brass though.
Can you ask Lehigh for an estimated weight of the 215 CF made in copper? That might be the ticket without a ton of additional R&D costs.
Can you ask Lehigh for an estimated weight of the 215 CF made in copper? That might be the ticket without a ton of additional R&D costs.
#24
Nontypical Buck
Joined: Mar 2009
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From: Saxonburg Pa
#25
GM, I'm no metal engineer but I'm thinking that Dave used the brass for control in opening. Copper being softer would probably require a lot of rethinking on the slits and such for the controlled fracturing. Correct me if I'm wrong on that assumption as my metallurgy knowledge is geared more to steels than heavy metals.
#26
Lehigh currently sells some CF and Maximum Expansion bullets in copper. http://www.lehighdefense.com/collect...led-fracturing
Last edited by Gm54-120; 01-14-2016 at 10:35 AM.
#28
Well that is what i would like to find out. How well a 215gr CF would work in copper and how much it would weigh in copper. Lehigh also makes a Max Expansion 308 in copper.
Im not locked into the fracturing requirement. Expansion is fine with me also. My FPS window is huge. I can shoot them pretty much as fast as i want or as slow as a 10mm carbine. Ive shot a 225gr Barnes so fast it kinda fractures and the energy dump was impressive. The recovered bullet still weighed around 200gr.
Im not locked into the fracturing requirement. Expansion is fine with me also. My FPS window is huge. I can shoot them pretty much as fast as i want or as slow as a 10mm carbine. Ive shot a 225gr Barnes so fast it kinda fractures and the energy dump was impressive. The recovered bullet still weighed around 200gr.
Last edited by Gm54-120; 01-14-2016 at 10:41 AM.
#29
Nontypical Buck
Joined: Mar 2009
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From: Saxonburg Pa


