Just go my new YHM Suppressor, and went to the range today to try it out on my 300/221 upper, and test some loads. Conditions - COLD (around 34F), windy, snow flurries. And because its 2 days before PA Buck season, crowded. No down time to set up the Chrono. What the heck, I'll just listen for the supersonic crack to go away as I switch loads to lighter powder loads. Shot a few loads, made sure there were no keyholing going on, then screwed the suppressor on.
Pfft...Whump!
"Dang that thing is quiet!" the guy on the next bench said.
I wanted to try out the 300 AAC BLACKOUT 220 gr loading, and was dropping in .3 gr increments to get there. Unfortunately, somewhere along the line, the load notes blew out of my ammo box, so I'm not sure what loading was that is just under the speed of sound. I do know that I was probably around 12gr, and no-where near the 11.2gr Blackout duplication load, Heck, I was seeing the bullets arcing to the 100 yard target on some of the loads 3 steps up from 11.2gr. With those notes gone, I'm back to square one, and will be pulling some bullets to reload the unknowns.
How much does temp affect the velocity of AA 1680?
Is there a chart or program out there that shows the speed of sound if you feed in temp, altitude and humidity?
Threaded Mode