Share your 300 Blackout Loads here>

[thespecialist]

I've had good luck with the following for a plinking round.

147gr M80 pulldowns, seated to the cannelure (don't have the COL in front of me)
LC converted brass
16.5gr H110
CCI 400 primers

Runs 1955fps (ES of 35fps) from my 16" CMMG barrel, 1-1.5 MOA accuracy.

[pomofo]

Some more chrono results from today.

All loads fired through a 16" 300 Fireball upper with carbine gas. Brass is Remington 221 Fireball. Primers are CCI 41.

1. Hornady 220 grain RN - COAL 2.000" - 11.6 grains Accurate 1680 - 9 shots, last round jammed on feeding
Quickload predicts 1275 fps @ 35K psi

• HI 1107
  LO 1054
  AVG 1076
  SD 20
  ES 53

2. Hornady 220 grain RN - COAL 2.000" - 12.8 grains Accurate 1680 - 9 shots, last round jammed on feeding
Quickload predicts 1406 fps @ 49K psi

• HI 1275
  LO 1225
  AVG 1237
  SD 16
  ES 50

3. Hornady 225 grain BTHP - COAL 2.240" - 10.4 grains Accurate 1680 - 10 shots, bolt locked back on last shot
Quickload predicts 1179 fps @ 32K psi

• HI 993
  LO 935
  AVG 959
  SD 17
  SD 58

4. 145 grain M80 FMJ from Wideners - 2.200" - 19.0 grains Accurate 1680 - 10 shots
Quickload predicts 1939 fps @ 48K psi

• HI 1910
  LO 1870
  AVG 1888
  SD 12
  ES 40

5. 125 grain Nosler Ballistic Tip - 2.150" - 20.6 grains Accurate 1680 - 9 shots (second to last jammed)
Quickload predicts 2159 fps @ 55K psi

• HI 2018
  LO 1978
  AVG 1994
  SD 14
  ES 40

6. 168 grain Prvi BTHP Match - 2.260" - 17.9 grains Accurate 1680 - 6 shots (the other 4 weren't picked up for some reason)
Quickload predicts 1836 fps @ 54K psi

• HI 1743
  LO 1684
  AVG 1718
  SD 20
  ES 59

[JohnInNH]

ES in the 50's

The M80 ball load looks like a fun load. The M2 has a little more room for powder. so you can get a tad more FPS at the same PSI. and at close to or at 2000 FPS is a mean round. *I* would not want to get hit by one.. and they will penetrate like crazy.

[pomofo]

ES in the 50's

The M80 ball load looks like a fun load. The M2 has a little more room for powder. so you can get a tad more FPS at the same PSI. and at close to or at 2000 FPS is a mean round. *I* would not want to get hit by one.. and they will penetrate like crazy.

Yeah, I load with an RCBS Chargemaster that unfortunately is just about right in front of the window-mounted A/C in the basement. Probably about an 0.1-0.2 grain fluctuation either way right now. Can't wait till I get to turn that thing off. I'll be testing the 150 Nosler Ballistic Tip on Monday, maybe the Hornady 150 FMJ too. If I can get a 150 up to 2000 that would be a good go-to load.

[Maryland_Shooter]

ES in the 50's

The M80 ball load looks like a fun load. The M2 has a little more room for powder. so you can get a tad more FPS at the same PSI. and at close to or at 2000 FPS is a mean round. *I* would not want to get hit by one.. and they will penetrate like crazy.

Yeah, I load with an RCBS Chargemaster that unfortunately is just about right in front of the window-mounted A/C in the basement. Probably about an 0.1-0.2 grain fluctuation either way right now. Can't wait till I get to turn that thing off. I'll be testing the 150 Nosler Ballistic Tip on Monday, maybe the Hornady 150 FMJ too. If I can get a 150 up to 2000 that would be a good go-to load.

Novel idea - move the scale? Just sayin'

[pomofo]

ES in the 50's

The M80 ball load looks like a fun load. The M2 has a little more room for powder. so you can get a tad more FPS at the same PSI. and at close to or at 2000 FPS is a mean round. *I* would not want to get hit by one.. and they will penetrate like crazy.

Yeah, I load with an RCBS Chargemaster that unfortunately is just about right in front of the window-mounted A/C in the basement. Probably about an 0.1-0.2 grain fluctuation either way right now. Can't wait till I get to turn that thing off. I'll be testing the 150 Nosler Ballistic Tip on Monday, maybe the Hornady 150 FMJ too. If I can get a 150 up to 2000 that would be a good go-to load.

Novel idea - move the scale? Just sayin'

Unfortunately that's not possible.

[pomofo]

Latest chrono results.

As before, all loads fired through a 16" 300 Fireball upper with carbine gas. Brass is Remington 221 Fireball. Primers are CCI 41.

1. Hornady 225 grain BTHP - COAL 2.240" - 11.6 grains Accurate 1680 - 5 shots - bolt held open on last shot
Quickload predicts 45K psi and 1316 fps

• HI 1122
  LO 1110
  AVG 1115
  SD 4
  ES 12

2. Hornady 225 grain BTHP - COAL 2.240" - 11.8 grains Accurate 1680 - 5 shots
Quickload predicts 48K psi and 1339 fps

• HI 1201
  LO 1150
  AVG 1173
  SD 21
  ES 51

3. Hornady 225 grain BTHP - COAL 2.240" - 12.0 grains Accurate 1680 - 5 shots
Quickload predicts 51K psi and 1362 fps

• HI 1196
  LO 1155
  AVG 1175
  SD 15
  ES 41

4. Hornady 225 grain BTHP - COAL 2.240" - 12.2 grains Accurate 1680 - 5 shots
Quickload predicts 54K psi and 1385 fps

• HI 1220
  LO 1194
  AVG 1203
  SD 10
  ES 26

5. Hornady 225 grain BTHP - COAL 2.240" - 12.4 grains Accurate 1680 - 5 shots
Quickload predicts 58K psi and 1409 fps

• HI 1234
  LO 1204
  AVG 1221
  SD 11
  ES 30

6. Prvi 168 grain BTHP - COAL 2.260" - 18.0 grains Accurate 1680 - 5 shots - 4th round jammed, bolt failed to lock after last shot
Quickload predicts 55K psi and 1846 fps

• HI 1747
  LO 1714
  AVG 1732
  SD 13
  ES 33

7. Prvi 168 grain BTHP - COAL 2.260" - 18.1 grains Accurate 1680 - 5 shots - bolt failed to lock after last shot
Quickload predicts 56K psi and 1857 fps

• HI 1753
  LO 1730
  AVG 1737
  SD 9
  ES 23

8. Prvi 168 grain BTHP - COAL 2.260" - 18.0 grains Accurate 1680 - 5 shots - bolt failed to lock after last shot
Quickload predicts 58K psi and 1867 fps

• HI 1762
  LO 1737
  AVG 1746
  SD 10
  ES 25

9. Nosler 165 Ballistic Tip - COAL 2.230" - 16.3 grains Accurate 1680 - 5 shots - 4th round jammed, bolt locked open after last shot, only 1 shot picked up on chronograph because the data cable backed out after dozens of rounds of recoil
Quickload predicts 45K psi and 1713 fps

• AVG 1565

10. Nosler 165 Ballistic Tip - COAL 2.230" - 16.5 grains Accurate 1680 - 5 shots - only four shots picked up because I didn't notice the data cable was out until after the first shot
Quickload predicts 47K psi and 1735 fps

• HI 1637
  LO 1580
  AVG 1608
  SD 25
  ES 57

11. Nosler 165 Ballistic Tip - COAL 2.230" - 16.7 grains Accurate 1680 - 5 shots - 4th round jammed but bolt locked open after last shot
Quickload predicts 48K psi and 1756 fps

• HI 1631
  LO 1585
  AVG 1614
  SD 18
  ES 46

12. Nosler 165 Ballistic Tip - COAL 2.230" - 16.9 grains Accurate 1680 - 5 shots - switched from a 10-round GI to a 30-round PMag and had no more jams the rest of the session
Quickload predicts 50K psi and 1778 fps

• HI 1629
  LO 1608
  AVG 1619
  SD 8
  ES 21

13. Nosler 165 Ballistic Tip - COAL 2.230" - 17.1 grains Accurate 1680 - 5 shots
Quickload predicts 53K psi and 1800 fps

• HI 1654
  LO 1601
  AVG 1626
  SD 22
  ES 53

14. Nosler 165 Ballistic Tip - COAL 2.230" - 17.3 grains Accurate 1680 - 5 shots - only four shots picked up because I didn't notice the data cable was out until after the first shot
Quickload predicts 55K psi and 1822 fps

• HI 1644
  LO 1640
  AVG 1641
  SD 1
  ES 4

15. Hornady 150 FMJ - COAL 2.135" - 18.9 grains Accurate 1680 - 10 shots - only 7 shots picked up due to data cable backing out under combination of recoil and warmth - ended session here
Quickload predicts 55K psi and 1957 fps

• HI 1891
  LO 1853
  AVG 1873
  SD 14
  ES 38

Might be a couple weeks before I'm able to get back to the range to do more testing.

[Maryland_Shooter]

Novel idea - move the scale? Just sayin'

Unfortunately that's not possible.

Figures, easy solutions hardly ever are solutions

[Maryland_Shooter]

Latest chrono results.

As before, all loads fired through a 16" 300 Fireball upper with carbine gas. Brass is Remington 221 Fireball. Primers are CCI 41.

1. Hornady 225 grain BTHP - COAL 2.240" - 11.6 grains Accurate 1680 - 5 shots - bolt held open on last shot
Quickload predicts 45K psi and 1316 fps

• HI 1122
  LO 1110
  AVG 1115
  SD 4
  ES 12

pomofo,

When I run this in QL, I get different numbers, so what was the case trimmed to? I use 1.360 and the following numbers are the result:

36,867 psi
1,273 fps

[pomofo]

Latest chrono results.

As before, all loads fired through a 16" 300 Fireball upper with carbine gas. Brass is Remington 221 Fireball. Primers are CCI 41.

1. Hornady 225 grain BTHP - COAL 2.240" - 11.6 grains Accurate 1680 - 5 shots - bolt held open on last shot
Quickload predicts 45K psi and 1316 fps

• HI 1122
  LO 1110
  AVG 1115
  SD 4
  ES 12

pomofo,

When I run this in QL, I get different numbers, so what was the case trimmed to? I use 1.360 and the following numbers are the result:

36,867 psi
1,273 fps

For these estimates I'm using a case length of 1.356, case capacity of 24.53 grains with the default weighting factor of 0.6. I think that was the initial case capacity measurement I made way back when. I'm also using version 3.5 (updated from 3.4) of Quickload. I know that I've seen variations of a few thousand psi between version 3.4 on my work computer and 3.5 on my home computer, but the discrepancy between your numbers and mine is a little odd. Your psi numbers, though, are more in line with what I've seen from Accurate's load manual.

ETA: Let me try to take a quick screenshot.