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Long Range Hunting & Shooting
.300 win mag barrel length and twist...
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<blockquote data-quote="Bravo 4" data-source="post: 1511541" data-attributes="member: 8873"><p>Hook,</p><p>No arguing BC is a major part in down range performance (especially at longer ranges), no denying the "science". However it isn't the absolute. Velocity needs to be thrown in the mix as well. We both know the BC allows the bullet to maintain that velocity, thusly they work together to decrease time of flight. That's how you get less wind deflection. All I'm getting at is that there is a point to which a cartridge cannot push a bullet that is so long and heavy (high BC) and it "out do" one that may be a little lighter and faster. That works with all cartridges, even my .375 Snipetac. It's best performance is with bullets in the 375 (377) to 400 grain range. While there are bullets with much higher BC (such as the 452 grain Cutting Edge), it simply cannot push them fast enough to benefit. That's shooting out to 2000 yards.</p><p>I get what you are saying, here is an example I always use when explaining/comparing pure BC to pure velocity: </p><p>A 7mm RemMag will send a 140 grain soft point bullet around 3,200 FPS and a .308 can send a 215 Berger around 2600 FPS. At 600 yards and beyond I would take the .308 over the 7mag any day. The only place the .308 will not be superior is in drop. </p><p>Now what do you think the .308 could do when comparing the 215 and what has yet to be...the 245 grain Berger. I know-I know it's ridiculous as it isn't around, but I hope you see where I'm going with it.</p></blockquote><p></p>
[QUOTE="Bravo 4, post: 1511541, member: 8873"] Hook, No arguing BC is a major part in down range performance (especially at longer ranges), no denying the “science”. However it isn’t the absolute. Velocity needs to be thrown in the mix as well. We both know the BC allows the bullet to maintain that velocity, thusly they work together to decrease time of flight. That’s how you get less wind deflection. All I’m getting at is that there is a point to which a cartridge cannot push a bullet that is so long and heavy (high BC) and it “out do” one that may be a little lighter and faster. That works with all cartridges, even my .375 Snipetac. It’s best performance is with bullets in the 375 (377) to 400 grain range. While there are bullets with much higher BC (such as the 452 grain Cutting Edge), it simply cannot push them fast enough to benefit. That’s shooting out to 2000 yards. I get what you are saying, here is an example I always use when explaining/comparing pure BC to pure velocity: A 7mm RemMag will send a 140 grain soft point bullet around 3,200 FPS and a .308 can send a 215 Berger around 2600 FPS. At 600 yards and beyond I would take the .308 over the 7mag any day. The only place the .308 will not be superior is in drop. Now what do you think the .308 could do when comparing the 215 and what has yet to be...the 245 grain Berger. I know-I know it’s ridiculous as it isn’t around, but I hope you see where I’m going with it. [/QUOTE]
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