Load Catalog: Subsonic A1680, above 200gr

[bamachem]

This thread is a compilation of "Pet Loads" that others have contributed for publication. No chat and no discussion of loads. You can provide a link in your post for the "workup" of the load if you choose to post one.

Any loads listed are what have worked for others, but does not mean that they will work for you or your specific firearm. Pet Loads are NOT a shortcut nor a quick and cheap way to escape the sometimes tedious task of load development. Load development means starting with a LOWER powder charge and working up to that "Pet Load" in a safe and methodical manner, always checking for signs of overpressure along the way. NEVER take a "Pet Load" and use it as a starting point.

In order to be considered for publication, you can submit your information in the following format:

Rifle Used
Barrel Maker, Contour, Gas Length/Port Size (if known)
Barrel Length and Twist
Magazine Brand/Size
Bullet Used (grain, manufacturer, type)
Powder Charge and Brand
Case Used
Primer Used
COAL
Chronograph Velocity, if known or manual velocity, if known.
Any issues or problems, Failure to Fire, Failure to Feed, Failure to Eject, etc. Keep it short.
Link to your "workup" thread

This is an example of a load that I worked up in my AR:
AR15
AR Stoner, Med Contour, Carbine
16", 1:8 5R
MagPul PMAG, 30RD & Custom 10RD (cut down 30RD mag)
110 gr Hornady V-Max
19.6gr Hodgdon Lil'Gun
LC 5.56, reformed to 300BLK
CCI 450 Small Mag
2.10"
2350 FPS (estimated, manual)
Zero Issues so far. All feed, fire, and eject fine.
N/A

Please ensure that your load info is in this format when submitted. Any loads that are incomplete are subject to deletion at any time.

Again, no chat or discussion allowed. Chat and discussion should be done in your individual "workup" thread that you link to.

Thanks!

[xat230]

AR15
AAC, medium contour, pistol gas
9" 7 twist
GI & Brownells 30rnd mags
220g SMK
10.4g A1680
LC Case
Rem 7 1/2
2.085 col
Subsonic, fps unknown, Gemtech TPRS used
Feed, function, LRHO good, all shot through can
N/A

Keyword Catalog Code: LC-1680-220-SB

[MajorTom]

AR15
Noveke, Carbine
16", 1:8
MagPul PMAG 30RD & 20RD Lancer
225gr Hornady HPBT
10.5gr A1680
LC 5.56, reformed to 300BLK
Remington 7 1/2 Small Rifle
2.220"
Lightened carbine buffer
Unknown velocity, subsonic at 20F 300ft elevation 60% humidity
Zero Issues so far. All feed, fire, and eject fine. BHO as well.
N/A

Keyword Catalog Code: LC-1680-225-SB

[armed_zebra]

1:8 twist 8" Noveske bbl AR-15 SBR
Carbine spring and buffer
Magpul 30 and 20 round pmags

220SMK seated to 2.100"
11.2grains of A1680
LC Reformed brass trimmed to 1.358"
CCI 400 Small Rifle Primer
no crimp

average velocity: 1061 fps
100% reliable function with AAC 762 SDN-6 suppressor
does not always lock back on last round without the suppressor


Keyword Catalog Code: LC-1680-220-SB

[Falconpilot]

Rifle Used- AR-15 (M16 bolt carrier, Carbine buffer, wolf reduced power action spring)
Barrel Maker, Contour, Gas Length/Port Size (if known)- Wilson Combat 16" combat match barrel, carbine gas length, port 0.75
Barrel Length and Twist 16, 1 in 8"
Magazine Brand/Size GI
Bullet Used (grain, manufacturer, type) Hornady 208 Grain AMax
Powder Charge and Brand AA-1680 10.8 grains
Case Used Formed LC brass
Primer Used CCI small rifle
COAL 2.22"
Chronograph Velocity @ 45 degrees F. Speed of sound at that temp is 1101 fps
1024
1046
976
989
Any issues or problems- Functions flawlessly, and always locks the bolt back after last shot.

[SAPPNASTY]

Rifle: Custom Built VLTOR 300 Blackout
Barrel: Daniel Defense 300 AAC Blackout Nitride 16" 1:8
Gas System: Carbine Length
Cartridge: 300 AAC Blackout
Brass: Mixed headstamp (.223 Remington & 5.56 Nato) reformed
Bullet: Sierra MatchKing 220gr
Primers: CCI No. 400 Small Rifle
Powder: Accurate 1680
Charge: 10.9
Trimmed To: 1.358"
COL: 2.245"
Estimated FPS: 1,085 (Per Accurate Load Data)
Actual Average FPS: 960.4 @ 75 degrees
Speed of Sound @ 75 degrees: 1,135.07 FPS
Magazine: PMAG 30
Results: Function flawlessly, locked back after last shot, excellent accuracy

Here are the Chrony results:
1.) 952.3 2.) 1011 3.) 962.2 4.) 940.1 5.) 946.5 6.) 976.2 7.) 958.8 8.) 951.7 9.) 956.4 10.) 945.2

[SAPPNASTY]

Rifle: Custom Built VLTOR 300 Blackout
Barrel: Daniel Defense 300 AAC Blackout Nitride 16" 1:8
Gas System: Carbine Length
Cartridge: 300 Blackout
Brass: Mixed headstamp (.223 Remington & 5.56 Nato) reformed
Bullet: Berger Long Range BTHP 210gr
Primers: CCI No. 400 Small Rifle
Powder: Accurate 1680
Charge: 11.7
Trimmed To: 1.358"
COL: 2.250"
Estimated FPS: 1,104 (Per Accurate Load Data)
Actual Average FPS: 1,055 @ 75 degrees
Speed of Sound @ 75 degrees: 1,135.07 FPS
Magazine: PMAG 30
Results: Function flawlessly, locked back after last shot, excellent accuracy

Here are the Chrony results:
1.) 1079 2.) 1061 3.) 1036 4.) 1037 5.) 1099 6.) 1034 7.) 1056 8.) 1044 9.) 1057 10.) 1049

[StorminNormin]

Sierra 220gr SMK

Noveske 300BLK
Pistol length gas system
10", 1:7
MagPul PMAG, 30RD
220gr Sierra SMK
A1680 10.9gr
New Remington primed 300BLK brass
2.089" OAL
3/4 turn medium crimp Lee FCD
No Chrono yet
Zero Issues on any of the loads. All feed, fire, and eject fine.
Bolt held open on last round.
I fired 5 rounds suppressed and 5 rounds unsuppressed
My suppressor is the AAC 762-SDN-6

[certifiable]

AR w/ Pistol Gas:
viewtopic.php?t=96399
viewtopic.php?f=141&t=83844

16" AR w/ Carbine Gas:
viewtopic.php?f=141&t=84405

[S4area51]

Sierra 220gr SMK


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Nice shooting! What distance was that at? I had to look twice at the FIVE shot group.