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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Light, high BC bullet
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<blockquote data-quote="ss8541" data-source="post: 20900" data-attributes="member: 104"><p>I just compared the 140 grain J36 to the 130 grain HV bullet. With a 350 fps difference in velocity the HV shoots much flatter, 7.8 inch difference at 800 yds, and 12.7" less at 1000. The J36 is the best on wind though, with it's higher BC. With a 10 mph cross wind the J36 drifts 2.4 inches less at 800, and 4.5" less at 1000yds. If I was picking a bullet to use mainly out past 650 yards the J36 would get my vote. But since I am just looking for a good fairly in expensive (HV's go for 48$ per box of 50 delivered) all around loading right now (300 to 600 yards)I am leanning towards the HV, but this may change when I shoot them both at 600. </p><p> I used the standard G1 curve on the JBM ballistics software to do the comparison. The designer of the HV says that you should use a VLD drag curve, but I won't use anything other then a G1 unless this curve proves to be way off at 600 next week. </p><p> I have a question for Warren. Do you see any point in using a curve other then the G1, for bullets of VLD design? In some ballistics software I have seen the G5 listed for boat tails and the G7 curve for VLD designs. There is a huge difference between them when you run the numbers. what is more reliable from your experience.I understand that this will vairy from manufacter to manufacturer, and even bullet to bullet. I don't have enough experience shooting at long range with the VLD design to know. While in the Marines I shot thousands of rounds of 308 with 168 and 173 grain millitary special ball out to 1100 yards or so. And I have several thousand rounds through the Barret 50 cal. out to past 2,000. But I never had other bullets with a good design to compare. We had our drop charts and you just shot and made some adjustments to them for the lot, and the rifle under those conditions. I never got to pick and choose, or do my own testing. By the way Warren I can't waite to try the 200 grain J40's in my 300 Ultra on rockchucks out past 1000 yds.</p><p>Thanks,</p><p>Vince Foster</p></blockquote><p></p>
[QUOTE="ss8541, post: 20900, member: 104"] I just compared the 140 grain J36 to the 130 grain HV bullet. With a 350 fps difference in velocity the HV shoots much flatter, 7.8 inch difference at 800 yds, and 12.7" less at 1000. The J36 is the best on wind though, with it's higher BC. With a 10 mph cross wind the J36 drifts 2.4 inches less at 800, and 4.5" less at 1000yds. If I was picking a bullet to use mainly out past 650 yards the J36 would get my vote. But since I am just looking for a good fairly in expensive (HV's go for 48$ per box of 50 delivered) all around loading right now (300 to 600 yards)I am leanning towards the HV, but this may change when I shoot them both at 600. I used the standard G1 curve on the JBM ballistics software to do the comparison. The designer of the HV says that you should use a VLD drag curve, but I won't use anything other then a G1 unless this curve proves to be way off at 600 next week. I have a question for Warren. Do you see any point in using a curve other then the G1, for bullets of VLD design? In some ballistics software I have seen the G5 listed for boat tails and the G7 curve for VLD designs. There is a huge difference between them when you run the numbers. what is more reliable from your experience.I understand that this will vairy from manufacter to manufacturer, and even bullet to bullet. I don't have enough experience shooting at long range with the VLD design to know. While in the Marines I shot thousands of rounds of 308 with 168 and 173 grain millitary special ball out to 1100 yards or so. And I have several thousand rounds through the Barret 50 cal. out to past 2,000. But I never had other bullets with a good design to compare. We had our drop charts and you just shot and made some adjustments to them for the lot, and the rifle under those conditions. I never got to pick and choose, or do my own testing. By the way Warren I can't waite to try the 200 grain J40's in my 300 Ultra on rockchucks out past 1000 yds. Thanks, Vince Foster [/QUOTE]
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Light, high BC bullet
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