The Firing Line Forums Does slightly deformed tip of bullet affect ballistics under 100 yards?
 Forum Rules Firearms Safety Firearms Photos Links Library Lost Password Email Changes
 Register FAQ Calendar Search Today's Posts Mark Forums Read

 January 9, 2019, 05:51 PM #26 44 AMP Staff   Join Date: March 11, 2006 Location: Upper US Posts: 19,231 hmmm, let's see... take a rifle bullet at 3,000fps... and, to make it easy lets say 1 in 12" twist.. so that's 1 turn per foot, and 3,000 feet per second x 60 seconds in a minute.. I get 180,000 rpm, rotational speed Somebody else can tell us how that compares with a power drill, or the compressor vanes in a turbocharger..or jet engine... Sounds really fast, to me, but is it? __________________ All else being equal (and it almost never is) bigger bullets tend to work better.
 January 9, 2019, 06:08 PM #27 zeke Senior Member   Join Date: November 17, 1999 Location: NW Wi Posts: 837 maybe 30 revolutions at 100 yds? Never was real good at math when younger, and much older now
 January 9, 2019, 09:35 PM #28 HiBC Senior Member   Join Date: November 13, 2006 Posts: 6,178 It is pretty high rpm,but the answer s right in front of us. Every thing slows down,but one turn in 12 inches ? Is one turn in 12 inches. Or 3 per yard.... Sort of dampers the theory of the spinning bullet buzz sawing the insides of a critter.If nothing slowed down,the bullet would make about 1 1/4 turns passing through a deer.
 January 10, 2019, 08:40 AM #29 Mike Irwin Staff   Join Date: April 13, 2000 Location: Northern Virginia Posts: 40,165 To expand on my comments, I'm trying to find the photos that I've seen over the years of bullets in flight showing how the "atmosphere" for lack of a better word, flows around a bullet. Essentially, a high velocity bullet's nose is in a fairly static bubble as it flies, meaning that it really has very little effect on the bullet's path. The best photos that I've found are on the Wikipedia page on external ballistics. This one, in particular, shows both the bow shock wave and the trailing turbulence path from the bullet's base. https://en.wikipedia.org/wiki/Extern...llet,_1888.jpg In the images I've seen where bullet bases are imperfect, the trailing turbulence path is a LOT more confused and decidedly not symmetrical. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.
 January 10, 2019, 10:41 AM #30 briandg Senior Member   Join Date: May 4, 2010 Posts: 5,252 I was always pretty good at math. By using my skills with physics and other disciplines, I can say with absolute confidence that a bullet that was fired from a rifle with a 1;12 twist, travelling at pretty much any realistic velocity will rotate 100 times at 100 feet, and 300 times at 300 feet. The information shared here has been great. To address the buzz saw effect, almost anyone here has seen gel tests. Myself, I've never seen any one of them with a buzz saw, whenever I have seen evidence of rotation, it's been one rotation in the block, just as it would be in flight. But we are talking about accuracy, and just offhand, I think that mike has provided the best information as well as links to pages that can confirm it and provide further information. __________________ None.
 January 10, 2019, 11:07 AM #31 Don Fischer Senior Member   Join Date: March 2, 2017 Posts: 1,336 Something to think about. Year's ago Speer brought out the mag tip bullet. The idea was that the tip of a bullet melts off soon in flight. They had a high speed photo of it happening to sell their idea. If that is true then banged up bullet's don't hurt a thing. I think we can go even farther back than the mag tip and see the Rem core lock.Not much exposed tip on it either and it's a great bullet. On the other hand seem's I read somewhere that the plastic tip protect's the tip of the bullet. Probably does but better at starting opening I would think. Not sure the tip below the jacket need's protecting.
 January 10, 2019, 11:16 AM #32 zeke Senior Member   Join Date: November 17, 1999 Location: NW Wi Posts: 837 Guys-Thanks My math skills are not good. Also excellent link.
 January 10, 2019, 11:32 AM #33 T. O'Heir Senior Member   Join Date: February 13, 2002 Location: Canada Posts: 10,790 The only part of the bullet that matters is the base. If the base is damaged, in any way, the gases go in odd directions. That throws accuracy off. Makes no difference what the point looks like. Think in terms or the plethora of point shapes. All of 'em are accurate. __________________ Spelling and grammar count!
 January 22, 2019, 02:31 PM #34 Gas Bag Junior Member   Join Date: January 3, 2019 Posts: 11 IMHO, no it doesn't. The deformity is too small to mean much.

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Hogan's Alley     Tactics and Training     Handguns: The Semi-automatic Forum     Handguns: The Revolver Forum     Handguns: General Handgun Forum The Hide     The Art of the Rifle: Bolt, Lever, and Pump Action     The Art of the Rifle: Semi-automatics     The Art of the Rifle: General     The Dave McCracken Memorial Shotgun Forum     NFA Guns and Gear     The Hunt The North Corral     Lock and Load: Live Fire Exercises     Competition Shooting     Curios and Relics     Black Powder and Cowboy Action Shooting The Skunkworks     Gear and Accessories     The Smithy     Handloading, Reloading, and Bullet Casting         Bullet Casting     The Harley Nolden Memorial Institute for Firearms Research The Conference Center     General Discussion Forum     Law and Civil Rights         Legal and Political The Firing Line Gun Show     Retail Deals and Feedback Forum Support     Site Questions and Tech Support (NO FIREARMS QUESTIONS)     Software and Function Testing

All times are GMT -5. The time now is 02:46 AM.

 -- vBulletin 3 ---- vBulletin 3 - variable fonts ---- Low profile (unsupported) Forum Home Page - Archive - Top