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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 Blackout Trajectory VS Subsonic 45-70 Trajectory
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<blockquote data-quote="tim_w" data-source="post: 1450515" data-attributes="member: 11132"><p>The one very nice thing about super heavy bullets going slow as in subsonic vs those supersonic is.....</p><p>Subsonic speeds have many fold less air resistance than supersonic flight. Now of course you will be lobbing artillery but lets just look at vel and energy bleed. Take the same 220 gr smk using its g7 BC.</p><p></p><p>Lets say it can get the job done with a vel from 1000 to 700 fps and has a mv of 1000 fps. What is its lethal range in yd when it hits 700 fps or a mere loss of 300 fps and 240 ftlb of energy from @ muzzle?</p><p></p><p>Hard to believe but 1500 yards!!!!</p><p></p><p>Now same bullet but with a say 2800 fps mv. It will have lost 300 fps in a mere 200 yds. Its 240 ftlbs in just 60 yds.</p><p></p><p></p><p>My point is if a subsonic bullet has the energy and vel to get the job done easily @ 100 yd with 200-300 fps cushion if you can adjust accurately for drop and wind it can still get it done at some hard to beleive ranges. The wind would be the hard part given flight time IMO. </p><p></p><p>Still it shows just how much more energy it takes to hold supersonic flight vs subsonic. Its why nonexpanding solids of old traveling subsonic could get it done at some crazy ranges if they could hit the targeted game.</p></blockquote><p></p>
[QUOTE="tim_w, post: 1450515, member: 11132"] The one very nice thing about super heavy bullets going slow as in subsonic vs those supersonic is..... Subsonic speeds have many fold less air resistance than supersonic flight. Now of course you will be lobbing artillery but lets just look at vel and energy bleed. Take the same 220 gr smk using its g7 BC. Lets say it can get the job done with a vel from 1000 to 700 fps and has a mv of 1000 fps. What is its lethal range in yd when it hits 700 fps or a mere loss of 300 fps and 240 ftlb of energy from @ muzzle? Hard to believe but 1500 yards!!!! Now same bullet but with a say 2800 fps mv. It will have lost 300 fps in a mere 200 yds. Its 240 ftlbs in just 60 yds. My point is if a subsonic bullet has the energy and vel to get the job done easily @ 100 yd with 200-300 fps cushion if you can adjust accurately for drop and wind it can still get it done at some hard to beleive ranges. The wind would be the hard part given flight time IMO. Still it shows just how much more energy it takes to hold supersonic flight vs subsonic. Its why nonexpanding solids of old traveling subsonic could get it done at some crazy ranges if they could hit the targeted game. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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300 Blackout Trajectory VS Subsonic 45-70 Trajectory
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