300BlkTalk

Altitude change will change the velocity of the round. With increased elevation there is lower air density which will allow for an increase the velocity of the bullet everything else being equal. Altitude can’t be ignored as a contributing variable to a subsonic load. Similar effect as increasing t...

I have 7", 10" and 12" Ar's but the 10" is my favourite. The extra length of the 12" def makes it quieter though.

My bolt gun is 12" but that is a very different platform and ammo than the AR based rifles.

I can tell you that FMJ 150gr subsonic bullets will penetrate double thickness of level 2a kevlar. That is the projectile will easily pass through both sides of a 2a vest. I'm not sure how that would compare to a 3a but I suspect it would be a higher protection than 3a. The 2a vest I have is 21 laye...

One problem ..... or not .... depending on how you view it is that your ears can lead you astray quite easily. Our ears can be fooled by both duration and frequency. Longer duration and higher frequency will both be perceived as being louder. I learned this early on when I was developing baffle desi...

Thank you Dr.Phil for this info, and updates. Been a couple of years since I've done any reloading for the BO, or any reloading for that matter. Just got the set up at the new house, and have been working on a subsonic 130gn Speer Hot Core load with good success. I plan to work up a new hunting rou...

I've been designing and building suppressors for a long time now. But even though I consider myself much more than a "hobbyist", I'm not sinking thousands of dollars into a db meter and microphones. I guess I would as a business expense that I could claim on my taxes if I were to get my m...

Test Data: https://www.pdfhost.net/index.php?Action=Download&File=555b4f53cb5bd9dad36efbbd37a37d83 Hope this link works. Notice how there is only a 4dB difference between suppressed and unsuppressed? Thats because the meter is reacting too slowly and missing much of the sound peak. FWIW I've me...

So my helper insisted that because she helped me build my bench ( handed me screws), she got to be in the picture! :lol: I am getting my chrono next week. I also bought a db meter, so there will be no guessing which is the quietest. Hopefully next weekend I'll get to do some testing. Unless you spe...

Not to hijack the topic, but does anyone know what the most quiet gun and host has been to date? It would probably surprise many of you to find out. Hint: It's not the MP5SD. That honor goes to the 32acp Welrod, of all guns, was an improvised rudimentary design that hardly no one gives props to. So...

Realistically 16x is overkill for a BLK. You'd be better off with a 3-9 at most.