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Long Range Hunting & Shooting
Which cartridge for lrh for 1000yd.
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<blockquote data-quote="Bob Beck" data-source="post: 666665" data-attributes="member: 41555"><p>Interesting thread!</p><p></p><p>I will do my best to stay out of the way here, and see if I may be able to lend some thoughts that may help out?</p><p></p><p>I am thinking there are a few ways to think of this? One is energy at target, retained velocity, and lastly forgiveness. We all know the big 338's deliver the energy at target and most of the time are the best bucking the wind. However in this conversation there may be somewhat different factors? Now assuming the 195 EOL/Berger Heavy Hybrid is a success? I need to mention that the performance is still unknown for some time still until I can put it through the ringer, but from the information that we have currently, with the form factor is .850 and is about the slickest bullet on the planet! To my point, that out of our 7mm Ultra with our throat design, we can get 3150 fps out of the 195. When you carry that speed with a B.C. of .794 it just falls short on energy to a .338 at 2750 fps by 275 ft lbs at 1000 yards. The 338 at 2163 ft lbs, and the 7mm at 1888 ft lbs. Now the real interesting factors! The 7mm speed is over 66% of its original velocity at 2089 fps. The .338 is only at 65% at 1802 fps. Now that does not seem like much difference, but by percentages this is huge considering the weight difference is what got the .338 to the B.C. of .818. So the fact that the 7mm 195 grain at .794 has a higher percentage of retained velocity and is 105 grains less weight is impressive to say the least! Also looking at the criteria of this conversation, using the 1800 fps mark as acceptable speed for bullet performance, look at the velocities of the two! Now my last interesting point, given a full 10 mph wind value all the way out to 1000 yards, the 7mm out performs the .338 by 3/4 MOA. This surely makes you wonder about forgiveness???</p></blockquote><p></p>
[QUOTE="Bob Beck, post: 666665, member: 41555"] Interesting thread! I will do my best to stay out of the way here, and see if I may be able to lend some thoughts that may help out? I am thinking there are a few ways to think of this? One is energy at target, retained velocity, and lastly forgiveness. We all know the big 338's deliver the energy at target and most of the time are the best bucking the wind. However in this conversation there may be somewhat different factors? Now assuming the 195 EOL/Berger Heavy Hybrid is a success? I need to mention that the performance is still unknown for some time still until I can put it through the ringer, but from the information that we have currently, with the form factor is .850 and is about the slickest bullet on the planet! To my point, that out of our 7mm Ultra with our throat design, we can get 3150 fps out of the 195. When you carry that speed with a B.C. of .794 it just falls short on energy to a .338 at 2750 fps by 275 ft lbs at 1000 yards. The 338 at 2163 ft lbs, and the 7mm at 1888 ft lbs. Now the real interesting factors! The 7mm speed is over 66% of its original velocity at 2089 fps. The .338 is only at 65% at 1802 fps. Now that does not seem like much difference, but by percentages this is huge considering the weight difference is what got the .338 to the B.C. of .818. So the fact that the 7mm 195 grain at .794 has a higher percentage of retained velocity and is 105 grains less weight is impressive to say the least! Also looking at the criteria of this conversation, using the 1800 fps mark as acceptable speed for bullet performance, look at the velocities of the two! Now my last interesting point, given a full 10 mph wind value all the way out to 1000 yards, the 7mm out performs the .338 by 3/4 MOA. This surely makes you wonder about forgiveness??? [/QUOTE]
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Which cartridge for lrh for 1000yd.
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