New 9mm Major powder? Win 572!

[racer-x]

11 hours ago, d_striker said:

 

Denser than WAC?

 

Can you fill an entire case and weigh it for us?  

 

Full 9mm case of W572 is around 11 gr.

 

I haven't tried 572. Found this in a BE post.

Compared to 12.3gr WAC to fill up a 9mm case.

 

[d_striker]

1 hour ago, racer-x said:

 

Full 9mm case of W572 is around 11 gr.

 

I haven't tried 572. Found this in a BE post.

Compared to 12.3gr WAC to fill up a 9mm case.

 

 

Thanks!

[RickyBaby]

Any updates on 572?

 

[d_striker]

What kind of extreme spread and standard deviation are you guys seeing with this powder in 9 major?

 

My initial testing is showing ES's around 100 and SD's around 50.  I know it's not my barrel as I just had a new barrel put in and my Autocomp load runs single digit SD's in it.  With 572, I'm getting power factors between 168-181 in the same chrono string.  Interestingly, accuracy is still very good even with the large ES.  Also interesting to note that primers are still rounded and show no pressure signs, even in the ones that are 180+PF.  My Autocomp load at 173ish PF have pretty flattened primers.

 

124gr Precision Delta

7.7gr W572

1.150"

5.5" KKM barrel, no holes

 

 

Edited July 29, 2018 by d_striker

[RickyBaby]

I am using a 5.1" kkm barrel, no holes and am also using precision Delta's 124gr jhp and w572 @ 1.150. I am getting with 6.6grs pf 168 sd 13 es 31. 6.7grs gives me pf 170.8 sd 13 es 32. 6.8 gives me pf 172 sd 19 es 46. Maybe your Chrono needs new batteries or calibration. I am using a LabRadar.

[d_striker]

2 hours ago, RickyBaby said:

I am using a 5.1" kkm barrel, no holes and am also using precision Delta's 124gr jhp and w572 @ 1.150. I am getting with 6.6grs pf 168 sd 13 es 31. 6.7grs gives me pf 170.8 sd 13 es 32. 6.8 gives me pf 172 sd 19 es 46. Maybe your Chrono needs new batteries or calibration. I am using a LabRadar.

 

Interesting. I used a buddy’s chrono after a match yesterday and got the same results as my chrono. 

 

Side question, have you noticed any temperature sensitivity with 572?

[RickyBaby]

I haven't shot this alot, just testing indoors. I get better results with AA#7 and vv3n38

[d_striker]

After further testing, 572 is definitely reverse temp sensitive.  Still getting very large ES and SD's at ambient temps.  At colder temps, ES and SD are smaller.  

 

I put some ammo on ice on the hour drive to the range and chrono'd it against ammo at ambient temps which were around 70F today.  

 

124gr Precision Delta @ 1.150"

 

7.2gr 572-10 shots

Iced-avg-1416, es-54, sd-16, pf 175.5

Ambient-avg-1361, es-87, sd-30, pf 168.7

 

7.5gr 572-10 shots

Iced-avg-1456, es-33, sd-10, pf-180.5

Ambient-avg-1359, es-77, sd-26, pf-168.5

 

7.7gr 572, 10 shots

Iced-avg-1486, es-76, sd-21, pf-184

Ambient-avg-1392, es-97, sd-38, pf-172.6

 

 

 

[RickyBaby]

Thanks for that info. That's amazing. I would not have known. So iced is 7-12pf stronger or 60-90 fps faster with 30 degree difference.

[d_striker]

1 hour ago, RickyBaby said:

Thanks for that info. That's amazing. I would not have known. So iced is 7-12pf stronger or 60-90 fps faster with 30 degree difference.

 

It appears that way in my gun.  

 

I also noticed another thing.  OAL seems to have an affect on velocity but not in the intuitive direction one would think.  Max OAL with a 124 PD in my barrel is about 1.170" which is why I'm loading to 1.150".  I loaded some to 1.165" also and noticed that velocity was slightly higher than ones at 1.150" and 1.135" at the same charge.

 

7.2gr 572

1.150" 168.7 PF

1.165" 170.5 PF

 

7.5gr 572

1.150" 168.5 PF

1.165" 173.4 PF

 

My very first chrono testing was at 1.135" as that is what I run with Autocomp.  Velocity seemed even more erratic at that OAL.

[noylj]

You sure it isn't just re-branded CFE Pistol, like 231/HP38, etc.?

[OPENB]

CFE Pistol is supposed to be Autocomp I've been told.

[d_striker]

572 looks nothing and performs nothing like cfe pistol. As openb stated, cfe pistol is autocomp with copper fouling eliminator coating. 

[RickyBaby]

1 hour ago, OPENB said:

CFE Pistol is supposed to be Autocomp I've been told.

It is, according to my testing and others. Chrono shows CFE slightly more energetic than wac, 572 is by itself. I have not found a powder similar yet.

[d_striker]

23 minutes ago, RickyBaby said:

It is, according to my testing and others. Chrono shows CFE slightly more energetic than wac, 572 is by itself. I have not found a powder similar yet.

 

Reports have shown cfe requiring both slightly less and more of a charge than wac to hit same velocity.  I’m guessing this is simply due to lot variation. 

 

Ive used wac for about 60k rounds. Some lots require .2-.3gr more powder to hit same velocity as previous lot. Which means some lots require .2-.3gr less. 

 

 

[Bamaboy]

I shoot a matchmaster with a 124grn BBI.  I was thinking hs6 or something VV but now I'm not sure what to do. Cleaner the better. Any help from the pros would be great

[d_striker]

23 minutes ago, Bamaboy said:

I shoot a matchmaster with a 124grn BBI.  I was thinking hs6 or something VV but now I'm not sure what to do. Cleaner the better. Any help from the pros would be great

 

I’ve shot a couple thousand using W572 now. I’ve found that it’s a little quirky as far as reloading and consistency. It’s pretty reverse sensitive and it’s sensitive to oal. 

 

Im finding that it seems to need a bit of space between the the powder and bullet or it doesn’t burn efficiently and velocity becomes erratic. I’m using it with 124’s. Have not tried with 115’s. 

 

The things i like about it so far is that it is clean. Cleaner than Autocomp even. It’s a slow burn rate powder which makes me feel better pushing to 175PF in 9 major. And it seeems to generate a good amount of gas. 

 

I bought 16 lbs to try out. Although I like it, I’ll prob switch to something else after it’s gone due to the temp sensitivity.