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<blockquote data-quote="Red Sparky" data-source="post: 1056189" data-attributes="member: 37223"><p>There are three things about bullets. 1) Internal ballistics-The time the bullet is in the barrel. 2) Exterior ballistics-The time the bullet is in the air 3) Terminal ballistics-The damage done to the object the bullet hits.</p><p></p><p>Now as far as exterior ballistics (2) the 6.5 is better than the 7MM. Look at the bullet drops with the same bullet weight and MV and you will see the 6.5 reaches with higher velocity and less drop. The difference is sectional density (SD) and ballistic coefficients (BC).</p><p></p><p>Now as far as terminal ballistics go (3) if the bullet has sufficient energy to expand and penetrate they should be equal. The amount of damage to vital organs is what you look at. If both bullets expand and penetrate they should do their job. Bullet composition and jackets, etc. have more to do with terminal ballistics. Examples are Nosler Patitions, and the like, vs. plain Spitzer lead tipped jacketed bullets.</p><p></p><p>I will use the .44 240 grain Hornady XTP which list the optimum velocity between (I think) 1100-1800fps to have the best terminal velocity as an example. If the bullet hits a deer out of a .44 carbine rifle at 1700fps or out of a ML with 1200fps the bullets should both perform the way they were designed and have maximum terminal ballistics. The animal will not know the difference. </p><p></p><p>The external ballistics (2) don't really matter as it is the same bullet with the same sectional density (SD) and ballistic coefficient (BC) which apply to exterior ballistics. It is going to fly like a pig with wings. The bullet composition is the same so they will expand and penetrate for the optimum terminal performance.</p><p></p><p>Where most people make the mistake is applying exterior ballistics (2) to terminal ballistics (3). Comparing apples to oranges as there are complete differences between the two. An example is a boat tail bullet, which has nothing to do with terminal ballistics but everything to do with external ballistics. The Partition and A-frame have nothing to do with external ballistics but a lot with terminal ballistics.</p></blockquote><p></p>
[QUOTE="Red Sparky, post: 1056189, member: 37223"] There are three things about bullets. 1) Internal ballistics-The time the bullet is in the barrel. 2) Exterior ballistics-The time the bullet is in the air 3) Terminal ballistics-The damage done to the object the bullet hits. Now as far as exterior ballistics (2) the 6.5 is better than the 7MM. Look at the bullet drops with the same bullet weight and MV and you will see the 6.5 reaches with higher velocity and less drop. The difference is sectional density (SD) and ballistic coefficients (BC). Now as far as terminal ballistics go (3) if the bullet has sufficient energy to expand and penetrate they should be equal. The amount of damage to vital organs is what you look at. If both bullets expand and penetrate they should do their job. Bullet composition and jackets, etc. have more to do with terminal ballistics. Examples are Nosler Patitions, and the like, vs. plain Spitzer lead tipped jacketed bullets. I will use the .44 240 grain Hornady XTP which list the optimum velocity between (I think) 1100-1800fps to have the best terminal velocity as an example. If the bullet hits a deer out of a .44 carbine rifle at 1700fps or out of a ML with 1200fps the bullets should both perform the way they were designed and have maximum terminal ballistics. The animal will not know the difference. The external ballistics (2) don't really matter as it is the same bullet with the same sectional density (SD) and ballistic coefficient (BC) which apply to exterior ballistics. It is going to fly like a pig with wings. The bullet composition is the same so they will expand and penetrate for the optimum terminal performance. Where most people make the mistake is applying exterior ballistics (2) to terminal ballistics (3). Comparing apples to oranges as there are complete differences between the two. An example is a boat tail bullet, which has nothing to do with terminal ballistics but everything to do with external ballistics. The Partition and A-frame have nothing to do with external ballistics but a lot with terminal ballistics. [/QUOTE]
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