Subsonic bullet backwards9/26/2023 This is really the neglected area of ballistics, for rifle bullet subsonic shooting. While there is plenty of information on BC's for supersonic speeds, there is a dearth of it for subsonic shooting. An example is Clays, where I had some keyholing in 338 but never any with Trailboss. Also, some powders cause keyholing because they are position-dependent because of low fill rate. 015-.020, it may be stable because of reduced pitch and yaw. 070 might have keyholing, but when you reduce the jump to. So.unless you're shooting distance is short for subsonics, then loading a bullet backwards is not a good plan.īTW, my experience developing 308 and 338 subsonics show that reducing the jump distance to reduce pitch and yaw greatly decreases the possibility of keyholing. Bryan is also the Chief Ballistician for Berger bullets. They would have increased nose drag because of the flat nose and increased base drag like a flat base bullet. They would act like a flatbase bullet and have increased base drag. What does this mean? Many boattail bullets loaded in backwards would not act like a boattail because of the greater than 20 degree angle. Here is a good article at Rifle Shooter talking about base drag and flat-base versus boattails.īryan Litz, many times world champion and author of: Applied Ballistics For Long Range Shooting, shows in his book that a boattail greater than 20 degree angle causes the laminar flow to dettach and act like a flat base bullet. However, Crosshair was right that BC matters at subsonic speeds if you want to shoot at distance at subsonic In flat-base bullets, they are shorter than a boattail bullet of the same weight and their center-of-gravity is farther back to the rear, so they (flat-base) have better stability at marginal twist rates. Other research shows that rebated boattails work very well at subsonic speeds (200gr subsonic bullet made by Lapua). This results in high subsonic BC and less loss of speed with distance. Boattail bullets have their greatest benefit at subsonic speeds with up to half the base drag as flat-base bullets. At subsonic speeds, base drag becomes far more important. yet, everyday, you climb into your metal beast, strap on a two inch web belt and challenge complete strangers to a duel and only by the goodness of their heart or love of their own life do you not smash into one another at 30-65 miles per hour.Īdd in a twisting mountain road and your odds for survival dip substantially.It is true that at supersonic speeds, the base drag is far less than air resistance and wind deflection. Think about it, you and a complete stranger are basically jousting with 3-4 thousand pound horses with only a white painted line separating you from potential disaster. Yet the vitriol for firearm accidents is always at a shrill or at the least exaggerated level. Hell, just driving your car to church is more dangerous on a routine basis than shooting out in the desert. Lots more people get hurt in those activities each year than firearm accidents, some even die. I don't hear a lot of public outcry (well actually I do now from the hand wringers) about football, car racing, motorcycle racing, (fun) ATV riding, skiing, but why don't humans have the same reverence to other everyday activities the same way as is touted with firearms? I hear what you're saying, and I subscribe to that theory. If absolute security was the goal we would never drive cars, fly airplanes or have swimming pools, or bath tubs.īut you are 100% responsible for your actions.if you fail, the excuse I tried really hard means nothing. we do the best we can while still accomplishing the mission (or fun) On the safe side I scan the area for a long while for persons, I listen and stalk so the chances of someone being in the AO is very slim.īut nothing in life is a zero risk, for me or someone else. Then you should be aware that you will have to hold shots.
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