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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Introducing Cutting Edge Bullet's new LAZER high BC copper hunting bullet
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<blockquote data-quote="MontanaRifleman" data-source="post: 835234" data-attributes="member: 11717"><p>I think were close to the same page. I agree we need to take environmental conditions into account, that's how I get my dope to figure my drops.</p><p></p><p>I do think by considering the bullets dimension, construction and shape we can get a good idea of its BC based on current offering and their known performance. This is what I did when the LRAB's came out. By considering the 308 210 gr dimensions, construction and shape and comparing it to existing similar bullets I figured it was going to be very close in BC to the 210 Berger and 208 Amax. Two members here have confirmed that in some thorough testing. I was present for one test in which they were shot through an Oehler 35 for MV and shot over an accustic SuperChrono at 1K. Drops were calculated based on a guesstimated BC from info to date. The vertical spread was less than .5 MOA @ 1K and the MV and 1K velocities all agreed with the BC which was very close the mentioned bullets.</p><p></p><p>Yes, I do remember Berger went through 1 overall revision of and did have to revise the BC of their 338 OTM. I think Brian would admit his work isn't perfect, but IMO, it's about as good as it gets. Factors like stability can also affect BC. If a bullet is over stabilized, it won't nose over properly down range which would be detrimental to BC.</p><p></p><p>I think I can reasonably say that the advertized BC of CE bullets that I have looked closely at like the C21'a and C22's "seem" to be close to reality. That said, Litz tested the C32's for a G1 BC of .478 while advertised is .560. But we should note that Litz velocity range was 3000 fps to 1500 fps whereas the CE tests were based on an MV 3250 which will give a higher BC result. I'm more interested in the G7 BC. Interestingly, CE's tests of their C21, a more aggressive version (better form factor and longer) of the C32, showed a G1 BC of only .570, almost identical to the C32, and the MV used was 3380 fps. I think the C21 BC is closer to reality. I'll be finding out for myself before long.</p><p></p><p>Cheers</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 835234, member: 11717"] I think were close to the same page. I agree we need to take environmental conditions into account, that's how I get my dope to figure my drops. I do think by considering the bullets dimension, construction and shape we can get a good idea of its BC based on current offering and their known performance. This is what I did when the LRAB's came out. By considering the 308 210 gr dimensions, construction and shape and comparing it to existing similar bullets I figured it was going to be very close in BC to the 210 Berger and 208 Amax. Two members here have confirmed that in some thorough testing. I was present for one test in which they were shot through an Oehler 35 for MV and shot over an accustic SuperChrono at 1K. Drops were calculated based on a guesstimated BC from info to date. The vertical spread was less than .5 MOA @ 1K and the MV and 1K velocities all agreed with the BC which was very close the mentioned bullets. Yes, I do remember Berger went through 1 overall revision of and did have to revise the BC of their 338 OTM. I think Brian would admit his work isn't perfect, but IMO, it's about as good as it gets. Factors like stability can also affect BC. If a bullet is over stabilized, it won't nose over properly down range which would be detrimental to BC. I think I can reasonably say that the advertized BC of CE bullets that I have looked closely at like the C21'a and C22's "seem" to be close to reality. That said, Litz tested the C32's for a G1 BC of .478 while advertised is .560. But we should note that Litz velocity range was 3000 fps to 1500 fps whereas the CE tests were based on an MV 3250 which will give a higher BC result. I'm more interested in the G7 BC. Interestingly, CE's tests of their C21, a more aggressive version (better form factor and longer) of the C32, showed a G1 BC of only .570, almost identical to the C32, and the MV used was 3380 fps. I think the C21 BC is closer to reality. I'll be finding out for myself before long. Cheers [/QUOTE]
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Introducing Cutting Edge Bullet's new LAZER high BC copper hunting bullet
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