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supersonic
Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 343.2 m/s (1,126 ft/s; 768 mph; 667.1 kn; 1,236 km/h). Speeds greater than five times the speed of sound (Mach 5) are often referred to as hypersonic. Flights during which only some parts of the air surrounding an object, such as the ends of rotor blades, reach supersonic speeds are called transonic. This occurs typically somewhere between Mach 0.8 and Mach 1.2.
Sounds are traveling vibrations in the form of pressure waves in an elastic medium. In gases, sound travels longitudinally at different speeds, mostly depending on the molecular mass and temperature of the gas, and pressure has little effect. Since air temperature and composition varies significantly with altitude, Mach numbers for aircraft may change despite a constant travel speed. In water at room temperature supersonic speed can be considered as any speed greater than 1,440 m/s (4,724 ft/s). In solids, sound waves can be polarized longitudinally or transversely and have even higher velocities.
Supersonic fracture is crack motion faster than the speed of sound in a brittle material.
140 rounds of Sellier and Bellot 300 blackout. 124 grain, pictures show price range of .95-1.10 per round. Looking for $1 per round, so $140 total. Won’t have to pay a shipping fee either.
Well, as some may know I am prone to experiment a bit to tailor Loads for certain platforms and situations. I do some hunting in firearm restriction areas that require the use of a shotgun, .40 or larger revolver or auto pistols during modern firearm seasons. This got me to build a 10.5” 458...
For Sale or Trade: 430 230 rounds total of .300 AAC Blackout ammunition, mix of supers and subs supersonic (all brass case). First, the goods...
SUPERSONICS:
Sig OTM 125gr supersonics: 210 170 rounds (one box has ten inside).
Ammo, Inc. 110gr Hornady VMAX supersonic: 60 rounds
SUBSONICS...
Two boxes. Good stuff. Supersonic. Trade for? SPP, Powder (longshot or Accurate#2), trap loads for 12 or 20 gauge, 40S&W, 30-06, 357/38, 30-30
Paid $27 each. Will sell for same or $45 for both boxes. Let me know what you might be interested in trading. Thanks for looking.
Hello,
Sold my 300 blk so no need for the ammo. 16 boxes of 20 rounds so 320rds, 45 between 2 mags, and about 150 in range bag. Stored correctly. Looking to get just a little less then what I paid. No trades. Widow Gen 3 mag included
paid a pretty penny for these this year,(paid $2.25/rd) unfortunately got some medical bills to take care of so im gonna pass it on.
100 rounds of Barnes 110gr Tac-Tx
Solid copper, 2350fps $125
100 rounds Underwood controlled chaos 115GR
Solid copper Hollowpoint fracturing 2360fps
Best...
Hey yall, looking for some new bits for my Glock 19 Gen5 MOS and I got some 300blk to trade
All brass, all factory new.
400rds of magtech 123gr FMJ
50rds Aguila 150gr fmj
200rds ADI 147gr FMJ
Trade value is $1/rd which is less than I paid.
Located in NE Portland.
Looking for a nice Flat...
Looking to trade my 300 blk supers for some 5.56 or 9mm. 2to1 ratio on both. Meaning 2 or yours for one of mine.
150rds magtech 123gr fmj
100rds fiocchi 150gr fmj
All new, factory brass cased FMJ.
Brass cased 5.56/223 and 9mm only. No steel or aluminum.
Not looking to sell at the moment...
I have 1250 rds of supersonic and 200 rds of subsonic. I would rather sell together and would take $1650 for all 1450 rds. I will entertain offers for selling it in separate quantities.
- Supers -
• 200 Sellier & Bellot
• 300 Armscor
• 500 Idaho Ordnance Factory
• 250 loose rds
* all supers...