223 subsonic12/23/2023 But if you reduce the velocity to a subsonic 1100 fps, it produces only 150 foot-pounds. At 3250 fps, it produces 1,280 foot-pounds of energy at the muzzle. Since energy is the product of mass times velocity squared, a slower bullet has exponentially less energy than a faster one of the same weight. Is Subsonic Ammo Powerful Enough to Take Big Game? There’s still the question of performance, which is significantly hampered by going subsonic. But if all we wanted was quiet, we wouldn’t pull the trigger at all. Quietest of all is to use a silencer in tandem with subsonic ammunition, which can reduce the sound of gunfire to a whimper in the rain. It’s just one way to mitigate the noise.Īnother way is to buy a silencer (legal in 39 states), which will greatly muffle those escaping gases. So while subsonic ammo does eliminate the downrange crack, and does reduce the bang at the muzzle somewhat due to its lower velocity, it won’t make your centerfire rifle sound like mouse feet on felt. Walney down the road into a fit of agita. It’s the latter bang that causes hearing damage, reveals shooters’ positions, scares game, and works Mrs. Most of the noise inherent with shooting a rifle, however, comes not from the bullet breaking the sound barrier, but from expanding gases rapidly escaping the rifle’s bore. When a moving object, such as a bullet, breaks that threshold, there is an audible shock wave that sounds like the crack of a bullwhip. What is Subsonic Ammo?Īt sea level, the speed of sound is roughly 1127 feet per second. Still, subsonic ammo does fill an important niche for many hunters and shooters. Your rifle will still go bang, and none of this quieter ammo is powerful enough for hunting big game much past slingshot range. Subsonic cartridges do produce less noise than full-velocity rounds, but there’s no free lunch-as usual. The label on the ammo box says subsonic, so this stuff won’t spook every deer in the county like your earth-shattering aught-six does, right? Well, sort of. We may earn revenue from the products available on this page and participate in affiliate programs. 22lr sub?Īpart from anything else just what sort of a twist do you expect down the barrel of your. 223 will have a terrible arc and make hitting things a nightmare, just where are you seeing an advantage of a. 223 (lets forget BC for simplicity) and a 75g sub sonic. 22lr will have the same arc and energy as a 40g sub sonic. 22lr and will have little or no advantage at 100 yards over the. If it is sub sonic then it will be the same speed as your. 223 would certainly have that extra punch for vermin control with little noise. 22 subsonic is not much better than an air rifle, but a. My thoughts are based solely on noise nothing else and to me a. That got me thinking, no noise but plenty of hitting power at 100 yrds. 17hmr, unless I want something quite ie subsonics. The reason for the original question was based on the fact my. Source: Modern Reloading by Richard Lee, 1996 Ed. Only one load given "start" and "never exceed" figures are the same. I'd sell the LR as I rarely use it other than for braining cage trapped Foxes! I wouldn't even need to re-zero my scope for that.Ĥ5gr bullet over 11.5gr of IMR 4831 for predicted MV of 1085ft/sec with pressure at 10700 CUP and minimum COAL of 1.720". I'd love to work out some sub loads for my Hornet. If you're not doing it often £40 for powder is better than a complete. 22lr.Īs for making the loads, all you'd need to lay out on is a tub of powder. Shot placement will be a little less critical on a Fox than it would be with a. All you have to do is zero with the subs and you don't have anything to think about other than what you would with the. 22lr without thinking about drop? He said 10" drop compared to his normal loads. I can see where that could be useful.Ĭan you shoot at 100 yards with a. 308 doing the same speed will give you around 450ft-lbs. 22lr sub offers about 80ft-lbs at the muzzle if I remember right.
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