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<blockquote data-quote="Red Sparky" data-source="post: 1056213" data-attributes="member: 37223"><p>I don't disagree with you completely. The problem is bullet makers have to build their bullets for many different impact velocities. The reason I gave the XTP example. Your .257 bullet can hit faster (1700fps) but the .284 bullet can hit slower (1200fps). If they are in the proper velocity to expand and penetrate for the bullets they are shooting it makes no difference. The make up of the bullet has more to do with terminal velocity than any exterior ballistics calculation.</p><p></p><p>As I said you can have the highest BC with the best SD with a long tapered pointed boat tail in .257,.277,.284,.308 or any caliber you want. The hypothetical problem is it is a hollow point with an un-bonded lead core and very thin jacket, so it hits and blows up. No penetration, no wound channel, nothing. All the external ballistics looked good however. Or you can make an all copper bullet that doesn't expand. It has the highest SD and BC with a boat tail, all external ballistics look good but the bullet works just like a FMJ. </p><p></p><p>So if you build your bullet for terminal performance, bonded lead core or expanding all copper, you control the expansion of the jacket taper for impact velocities, and you keep it together for penetration it does not matter what the external ballistics say. Now you can not have a flying brick so bullet manufacturers have the spitzer or semi-spitzer point and some have boat tails to help with BC and SD. </p><p></p><p>If external ballistics play so much on terminal ballistics then why did that have to make the Game King and "recommend" the Match King bullets not be used on Game? Do you remember when Match King bullets first came out and blew up on game from misinformed hunters not knowing the difference? </p><p></p><p>Apples and oranges.</p></blockquote><p></p>
[QUOTE="Red Sparky, post: 1056213, member: 37223"] I don't disagree with you completely. The problem is bullet makers have to build their bullets for many different impact velocities. The reason I gave the XTP example. Your .257 bullet can hit faster (1700fps) but the .284 bullet can hit slower (1200fps). If they are in the proper velocity to expand and penetrate for the bullets they are shooting it makes no difference. The make up of the bullet has more to do with terminal velocity than any exterior ballistics calculation. As I said you can have the highest BC with the best SD with a long tapered pointed boat tail in .257,.277,.284,.308 or any caliber you want. The hypothetical problem is it is a hollow point with an un-bonded lead core and very thin jacket, so it hits and blows up. No penetration, no wound channel, nothing. All the external ballistics looked good however. Or you can make an all copper bullet that doesn't expand. It has the highest SD and BC with a boat tail, all external ballistics look good but the bullet works just like a FMJ. So if you build your bullet for terminal performance, bonded lead core or expanding all copper, you control the expansion of the jacket taper for impact velocities, and you keep it together for penetration it does not matter what the external ballistics say. Now you can not have a flying brick so bullet manufacturers have the spitzer or semi-spitzer point and some have boat tails to help with BC and SD. If external ballistics play so much on terminal ballistics then why did that have to make the Game King and "recommend" the Match King bullets not be used on Game? Do you remember when Match King bullets first came out and blew up on game from misinformed hunters not knowing the difference? Apples and oranges. [/QUOTE]
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