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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Does BC matters?
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<blockquote data-quote="Petey308" data-source="post: 2613997" data-attributes="member: 106845"><p>Great videos. I especially liked the parts when they pointed out how important it is that the manufacturer publishes numbers as close to accurate as possible and that inflating numbers to look more attractive doesn't do anyone any good. </p><p></p><p>BC does matter for the long range shooter/hunter and specifically a high BC matters most, when you can get. For the hunter, ensuring the bullet performs properly at your desired max range is crucial, and all the BC in the world won't matter if the bullet doesn't do the job properly upon impact. But, determining the max range of a particular bullet, if you know it's minimum impact velocity threshold, goes hand in hand with its BC. You need to know how much velocity will be retained to know exactly what the max range potential is with a particular bullet. If you're looking for a bullet for a particular cartridge and rifle setup, you want and need to trust published BC so that your decision making process has any chance of being made properly and accurately. The consumer shouldn't be left to just hope for the best and accept that the values might be way off and accept that they just need to try it out and find out for themselves. That seems quite unacceptable to me. </p><p></p><p>Yes, we all need to true our BC, and our actual BC will vary from the published due to differences like twist rate, barrel length, MV, environmental conditions, etc. However, the actual trued BC should not be significantly different from published, especially a G7 figure. If it's off too much due to poorly estimated or simply inflated published values (specifically lower in value) it means your max range is now lower, wind drift will be more at a set distance, etc and now you're not getting the max range you bought the bullet for in the first place. Now you have to make compromises, or start over. That's highly frustrating, and I've been there and done that. </p><p></p><p>BC is important to us for those reasons, and so we can accurately calculate our ballistics and put accurate rounds on our target. I'm not sure how many of us would say BC is priority number one though. I don't think many of us, if any, look at BC first when selecting a hunting bullet. </p><p></p><p>I personally (so your needs will be your own) want a bullet, in most cases, that will allow for quick and clean kills out to at least 1000 yards. That means I need to look at its minimum impact velocity potential and then if that puts me at 1000 yards or more in my particular cartridge and rifle. I have to determine likely MV, and then look at the published BC the manufacturer provides to determine that. If that published BC is way off, my figures will be too. </p><p></p><p>Once you true your BC though, and it's still at a value that gives you your desired max range, you're set. It doesn't really matter what it is at that point as long as it meets your requirements.</p><p></p><p>I use BC to make my bullet selection, make my ballistic charts, and to input into my Kestrel. I don't go chasing the latest and greatest bullet because it has a slightly higher BC.</p></blockquote><p></p>
[QUOTE="Petey308, post: 2613997, member: 106845"] Great videos. I especially liked the parts when they pointed out how important it is that the manufacturer publishes numbers as close to accurate as possible and that inflating numbers to look more attractive doesn’t do anyone any good. BC does matter for the long range shooter/hunter and specifically a high BC matters most, when you can get. For the hunter, ensuring the bullet performs properly at your desired max range is crucial, and all the BC in the world won’t matter if the bullet doesn’t do the job properly upon impact. But, determining the max range of a particular bullet, if you know it’s minimum impact velocity threshold, goes hand in hand with its BC. You need to know how much velocity will be retained to know exactly what the max range potential is with a particular bullet. If you’re looking for a bullet for a particular cartridge and rifle setup, you want and need to trust published BC so that your decision making process has any chance of being made properly and accurately. The consumer shouldn’t be left to just hope for the best and accept that the values might be way off and accept that they just need to try it out and find out for themselves. That seems quite unacceptable to me. Yes, we all need to true our BC, and our actual BC will vary from the published due to differences like twist rate, barrel length, MV, environmental conditions, etc. However, the actual trued BC should not be significantly different from published, especially a G7 figure. If it’s off too much due to poorly estimated or simply inflated published values (specifically lower in value) it means your max range is now lower, wind drift will be more at a set distance, etc and now you’re not getting the max range you bought the bullet for in the first place. Now you have to make compromises, or start over. That’s highly frustrating, and I’ve been there and done that. BC is important to us for those reasons, and so we can accurately calculate our ballistics and put accurate rounds on our target. I’m not sure how many of us would say BC is priority number one though. I don’t think many of us, if any, look at BC first when selecting a hunting bullet. I personally (so your needs will be your own) want a bullet, in most cases, that will allow for quick and clean kills out to at least 1000 yards. That means I need to look at its minimum impact velocity potential and then if that puts me at 1000 yards or more in my particular cartridge and rifle. I have to determine likely MV, and then look at the published BC the manufacturer provides to determine that. If that published BC is way off, my figures will be too. Once you true your BC though, and it’s still at a value that gives you your desired max range, you’re set. It doesn’t really matter what it is at that point as long as it meets your requirements. I use BC to make my bullet selection, make my ballistic charts, and to input into my Kestrel. I don’t go chasing the latest and greatest bullet because it has a slightly higher BC. [/QUOTE]
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