300 blk range results
- Thread starter waco
- Start date
Range finally open after the flood. 8 feet of H2O, up to the rafters. 1:8 10" BO pistol with 1035 gold HiTek, ACWW with Cu. 168gr GC & 185gr GC, 18 gr CFE BLK. Never tried the 31-165C in the BO, just the 308W. Shot at 7 yds, yea, I can see the reticle on the reflex but not POA!! Don't have a small enough scope to put on it. 
Now for some hogs.
edit: looks like the 165GC (31-165C) works best at this load, left and bottom (that's 3 holes in one) group. I've shot the 185 @ 25 before but got some horiz. stringing. It' me. CFE blk works pretty good but cases ejected @ 5 o'clock with this load. Guess I'll drop down a grain for the 185.
Now to chrony.
Edit: even though they were bit undersized, bore is clean except for a few CFEblk crumbs I see. I've heard blk needs almost compressed to burn clean. I need to swab out the barrel, seems like the junk is on the bottom below the port. Try to see if it burns or is already burned.
Got an appointment for cararact fix this month. Then I can see what I'm shooting at. Sure isn't cheap!!
Now for some hogs.edit: looks like the 165GC (31-165C) works best at this load, left and bottom (that's 3 holes in one) group. I've shot the 185 @ 25 before but got some horiz. stringing. It' me. CFE blk works pretty good but cases ejected @ 5 o'clock with this load. Guess I'll drop down a grain for the 185.
Now to chrony.
Edit: even though they were bit undersized, bore is clean except for a few CFEblk crumbs I see. I've heard blk needs almost compressed to burn clean. I need to swab out the barrel, seems like the junk is on the bottom below the port. Try to see if it burns or is already burned.
Got an appointment for cararact fix this month. Then I can see what I'm shooting at. Sure isn't cheap!!
Last edited:
Ian
Notorious member
The bullet flight noise increases substantially beginning about 100 fps before the sound barrier due to compression of the front wave. Typically, when building ammunition for maximum suppression, a target velicity of 80-120 fps below the speed of sound is desired. Note the abrupt uptick of the flight noise curve as the bullet speed approaches the speed of sound in the following graph:
Pistolero
Well-Known Member
And that noise takes energy to create. I would guess that the trajectory of a 1000 fps round
and a 1180 fps round might be significantly different at 200 yds due to the energy going
into the normal shocks, resulting in more drag.
Yep. My brother is a test pilot, and I studied aerodynamics and then fluids in my engineering
education. We talk about stuff like this, and I have learned a lot. Never tried to do a
Schlieren setup before. A 16" parabolic mirror is NOT cheap. That is from a huge telescope,
and the mirror is worth probably at least couple of grand, depending on how good the
figure is.
Here you go: https://www.ebay.com/itm/202500494073
One of the issues with designing a very, very efficient, fuel economical business aircraft is that
the customers want speed AND super efficiency. Normal shocks suck energy a LOT (drag/fuel burn) and on
an aircraft, you are nearly guaranteed to have them in a lot of places, more with a sloppy or ignorant
design, fewer in a smart and really careful design. So, going M= 0.78 will get you some serious
normal shocks on some airframe designs, while a different wing section and really careful nacelle
and tail design can delay any significant normal shocks as high as M=0.925. NOT easy to do, and
it takes a really careful detailed design, computer simulation, and then a lot of extremely precise
flight testing to make a biz jet go 800 mph and still be reasonably efficient. And tiny imperfections
in the 'as manufactured' shape compared to the 'as designed' shape can cause shocks very easily,
negating all that fancy design. So nearly flawless construction is critical, too. Those birds are
NOT cheap. $50-60 million, less paint and interior. And in that price range the interiors
are difficult to even explain. Some add well over $12 million paint and interior finishing.
I love "Smarter Every Day", partly because of the host, but this guy is really smart and does stuff
I would like to do. It was really interesting to find out, well after the fact that he and I chose
to view the last eclipse from about half a mile from each other in Wyoming, a few miles SW of
Douglas. I got some good pix, but he and his team got the Space Station transitioning across
the eclipse face. Now, THAT was really cool.
Also, unlike so many PC folks out there, he shoots and had friends who shoot and they often do
"cool gun stuff" with the high speed camera.
Bill
and a 1180 fps round might be significantly different at 200 yds due to the energy going
into the normal shocks, resulting in more drag.
Yep. My brother is a test pilot, and I studied aerodynamics and then fluids in my engineering
education. We talk about stuff like this, and I have learned a lot. Never tried to do a
Schlieren setup before. A 16" parabolic mirror is NOT cheap. That is from a huge telescope,
and the mirror is worth probably at least couple of grand, depending on how good the
figure is.
Here you go: https://www.ebay.com/itm/202500494073
One of the issues with designing a very, very efficient, fuel economical business aircraft is that
the customers want speed AND super efficiency. Normal shocks suck energy a LOT (drag/fuel burn) and on
an aircraft, you are nearly guaranteed to have them in a lot of places, more with a sloppy or ignorant
design, fewer in a smart and really careful design. So, going M= 0.78 will get you some serious
normal shocks on some airframe designs, while a different wing section and really careful nacelle
and tail design can delay any significant normal shocks as high as M=0.925. NOT easy to do, and
it takes a really careful detailed design, computer simulation, and then a lot of extremely precise
flight testing to make a biz jet go 800 mph and still be reasonably efficient. And tiny imperfections
in the 'as manufactured' shape compared to the 'as designed' shape can cause shocks very easily,
negating all that fancy design. So nearly flawless construction is critical, too. Those birds are
NOT cheap. $50-60 million, less paint and interior. And in that price range the interiors
are difficult to even explain. Some add well over $12 million paint and interior finishing.
I love "Smarter Every Day", partly because of the host, but this guy is really smart and does stuff
I would like to do. It was really interesting to find out, well after the fact that he and I chose
to view the last eclipse from about half a mile from each other in Wyoming, a few miles SW of
Douglas. I got some good pix, but he and his team got the Space Station transitioning across
the eclipse face. Now, THAT was really cool.
Also, unlike so many PC folks out there, he shoots and had friends who shoot and they often do
"cool gun stuff" with the high speed camera.
Bill
Last edited:
wquiles
Well-Known Member
Great shooting from the bolt-action. I just bought myself a 300 blackout setup (making a pistol with a 10.5" barrel setup to use with my Form1 suppressor), so I am learning about the 300blk and what loads to try.
And by the way, I loved that video - really nice to see all of that. I wish he also had tried with a suppressor on both the supersonic and subsonics as it would likely show some interesting visuals
And by the way, I loved that video - really nice to see all of that. I wish he also had tried with a suppressor on both the supersonic and subsonics as it would likely show some interesting visuals