300BlkTalk

I have the following powders for sale or trade. All are new and sealed except for 1 pound of A1680 that has had 20 300 Blackout rounds loaded out of it. 3 lbs A1680 1 lb Reloader 19 1 lb Hodgdon H1000 2 lbs Benchmark 1 lb IMR 4227 1 lb H110 I need H4350, Federal or CCI match primers, 6.5 140 Amax, 6...

This item is cross listed and reflect current price drop. Leupold Gold Ring Compact Spotter. 15-30x50 Glass is flawless. Includes screw on lens cover and soft case. $325 shipped. Sold Next up is a pristine IOR 4x24 (4x6 Tip2 LPS). Comes with soft cover, front lens cover and rear eyepiece Also includ...

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Here's what's included. AAC 300 Blackout Remington Model 7 with 1/8 twist. Traded Forester 300 Blackout full length die set. Traded Still Available: Lee 300 Blackout Full Length die set with Factory Crimp Die and Case Length Gauge (No shell holder) $25 shipped CONUS Sold 144 pieces +/- once fired br...

I understand that there are some issues in keeping a suppressor on a rifle after a range trip, because of condensation. But after things have cooled down, does anyone keep their can installed while in the safe? Reason I ask, is that we have a 4 legged pest problem around here. I could get away with ...

Thanks for the link and the help.

Paul

I suspect that it's less than 100 yards for subsonic, perhaps double that for supersonic? What would be good numbers to input for projectiles in the 180 to 225 grain range? Maybe 3" above and below the bore line?

Any input appreciated.

Thanks,

Paul

In the photo, that's not a representation of "air" but of "sound". So, there are two disturbances made, one thru the air and one to the sound if it's speed is exceeded? Sound is air pressure waves. As a supersonic bullet moves through the air a cone shaped air pressure shock wav...

I see. So once the bullet breaks the sound barrier (upon exit of the muzzle) then the cone is at it's flattest and continues to broaden out until the bullet slows back under the speed of sound and then the sound wave is perpendicular to the nose of the bullet. And then the subsonic crack will lead ...

The supersonic bullet creates a supersonic shockwave that we experience as the "crack." This shock wave is the sound, the bullet doesn't outrun the shock wave and run silent in front of the sound. http://www.galex.caltech.edu/media/images/glx2007-04r_img06_small.jpg I have some formal tra...