300 BLK Load Data

[Woodlanddude]

Hornady 110 GMX @ 2.22" OAL
Winchester new brass ran over expander (OAL was very consistent this batch)
CCI 41
H110 @ 20.0 Gr
2400 fps in 16" BCM chrome lined bbl

ETA, a second range trip on a 70 degree day yielded some ejector swipes.
19.4 grains @ 2350 with no pressure signs on a third try seemed like a sweet spot.

 

[Yasherka]

Hornady 110 GMX @ 2.22" OAL
Winchester new brass ran over expander (OAL was very consistent this batch)
CCI 41
H110 @ 20.0 Gr
2400 fps in 16" BCM chrome lined bbl

Holy Necrothread Batman!

 

[RLinNH]

Hornady 110 GMX @ 2.22" OAL
Winchester new brass ran over expander (OAL was very consistent this batch)
CCI 41
H110 @ 20.0 Gr
2400 fps in 16" BCM chrome lined bbl

Wow!!! Those are good numbers!!!

 

[Woodlanddude]

Holy Necrothread Batman!

I know, but this thread should be a sticky, with as much interest as this cartridge has now. 300 components are flying out of stock and off the shelves. It is king of nothing, but useful for several things, and handy in an ar-15 sized rifle. 110 - 125 grain quality bullets are hitting above its size.

 

[Spicerack]

300 AAC Blk, 9" Ballistics Advantage Barrel
Hornady 190 grain Sub-X
FC12 cases
CCI 400
A1680
2.070" COAL

Five cartridges of each charge weight were fired. I believe the 12.2g charge numbers are whacked due to an extra shot in the string when checking the chronograph results after shooting; like there was an extra shot from some previous data stored in the string or something. All loads functioned properly with ejected brass landing in a 2' diameter circle at ~4:00, with last round bolt hold open.

 

[Gingerbeardman]

300 AAC Blk, 9" Ballistics Advantage Barrel
Hornady 190 grain Sub-X
FC12 cases
CCI 400
A1680
2.070" COAL

View attachment 7328501

Five cartridges of each charge weight were fired. I believe the 12.2g charge numbers are whacked due to an extra shot in the string when checking the chronograph results after shooting; like there was an extra shot from some previous data stored in the string or something. All loads functioned properly with ejected brass landing in a 2' diameter circle at ~4:00, with last round bolt hold open.

View attachment 7328510

I’ve been searching for this load for a while. Same components, same setup. Thanks for posting.

 

[Spicerack]

I’ve been searching for this load for a while. Same components, same setup. Thanks for posting.

Glad it helps. I got starting data in an email from Hornady since they don't have it published yet:

 

[rifledoc]

Any loads for a 16" bolt gun? Or is this just for AR loads?