300aac Chrono results

[kmr007]

I have been reloading for some time now (223, 9mm, 40s&w) and added 300aac to my arsenal. I had plenty of un-usable 556/223 brass laying around and decided to sort out the LC brass and cut them down. I use a Redding T-7 for my rifle rounds and Lee Turret for hand gun rounds. Both have Lee powder measures. I have a mix bag of Lee and RCBS dies.

To sum it up, here is what I utilized for 300aac -

Speer TNT 125gr HP
H110 18gr (sometimes powder throw was 18.1)
LC 556/223 brass cut to 300aac specs
Final Length: 2.06-2.055

BCM 16" 1:7 twist carbine length gas system w/VG6 muzzle device
Spikes T-2 buffer

I shot 20 rounds (i thought it would reset after 10 rounds) using Competition Electronics Pro Chrono approximately 4-5ft away from shooting bench:

ES=136, SD=32, AU=2184

FPS:
1. 2157
2. 2182
3. 2185
4. 2182
5. 2218
6. 2192
7. 2133
8. 2203
9. 2164
10. 2093
11. 2207
12. 2192
13. 2225
14. 2200
15. 2222
16. 2178
17. 2196
18. 2229
19. 2175
20. 2164

[sigstroker]

Why not Blackout? Are the specs the same?

[G38xOC]

Idk how fast I'm pushing my pills out of 10.5 barrel , it sure is very pleasant to shoot with linear comp . How did group ?

[kmr007]

Why not Blackout? Are the specs the same?

Same 300aac or 300blk or whatever you want to call it.

[kmr007]

Idk how fast I'm pushing my pills out of 10.5 barrel , it sure is very pleasant to shoot with linear comp . How did group ?

Didnt really concentrate on grouping. I'll do that tomorrow. Will do 100yrds with a Vortex 3x behind a Trijicon MRO. Eyes arent that great anymore.

[MarikinaMan]

That’s SBR AK47 like energy. Great results.

[LynnJr]

The 300 Whisper AAC or Blackout doesn't tend to have low extreme spreads.
I mainly run mine subsonic with 240's but I do remember it not shooting groups smaller than a inch with regularity.

[sigstroker]

Why subsonic if you can't use a silencer? Sierra has data up to 1350 fps. 230's are even better, up to 1500.

[kmr007]

Why subsonic if you can't use a silencer? Sierra has data up to 1350 fps. 230's are even better, up to 1500.

Actually im running supers...but i will load subs soon. Unfortunately Im in a state that doesnt allow cans.

[sigstroker]

Actually, I was asking Lynn about his 240's.

[kmr007]

Here are some shots @100yds

https://drive.google.com/file/d/0B4pQn2z2UOH9bXdudTlDODRHV1k2czhpamNuZS1aU29SOXBn/view?usp=sharing

[LynnJr]

Sigstroker
I am running the 240's at close range for deer and the area needs a quiet load. Without a can the load is still pretty quiet and groups well but the trajectory is not very good.

[HAVOC5150]

208 gr Hornady, over H110 approx. 1200 fps out of a Remington model 7/AAC collaboration rifle. Super fun rifle. This is at 50 yards since the 100 was down.

http://www.calguns.net/calgunforum/attachment.php?attachmentid=833631&stc=1&d=1568005007