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Velocity and range report for 124 gn. 9mm +P Gold Dot from Velocity Ammo Sales. *** Updated with accuracy test. Login/Join 
Freethinker
Picture of sigfreund
posted
This report pertains to the Speer 9mm 124 grain +P Gold Dot Hollow Point bulk pack ammunition being advertised for sale by Velocity Ammo Sales (VAS):
https://www.velocityammosales....riant=32350345527373

And being linked in this thread:
https://sigforum.com/eve/forum...3106699/m/4120038384

Using a LabRadar chronograph and a SIG model full size P320 (4.7" barrel), I measured the velocities of 20 shots of the VAS ammunition and of 10 shots of the same load that was purchased a couple of years ago and which was packaged normally and not advertised as “non duty.”

VAS ammunition (20 rounds):
Average velocity: 1236 fps
Standard deviation: 26.5 fps
High velocity: 1308 fps
Low velocity: 1202 fps
Extreme spread: 106 fps

Normal pack ammunition (10 rounds):
Average velocity: 1236 fps*
Standard deviation: 13.9 fps
High velocity: 1261 fps
Low velocity: 1215 fps
Extreme spread: 46 fps
* (Yes, by coincidence the average velocities of both lots were exactly the same.)

The velocity spread of the VAS ammunition was obviously much greater than the “normal.” In addition to the 1308 fps shot, other shots that were greater than the highest normal lot shot were 1263, 1263, and 1284 fps. The greater extreme spread and the high velocity readings for a few of the shots were the only thing that was noticeably different from the “normal” lot. All rounds fired functioned normally. I wasn’t able to check the accuracy (precision) of the VAS ammunition because I forgot to take a suitable target backer to the range. I may experiment more with the VAS later.

The velocity spread would probably affect long range accuracy, but I doubt it would be noticeable at common defensive shooting distances. I will point out that the extreme velocity spread of the VAS ammunition was greater than what I’ve measured for the Gold Dot 124 grain +P “normal” load with other guns, but not by much. I once got an E.S. of 102 fps for a different lot.

All of this is obviously provided for information purposes only, and does not constitute an endorsement of or caution about using the VAS ammunition.

------------------------

Update 16Aug21:
Below is a 10-round group of the VAS ammunition fired at 7 yards. Pistol was a stock full size P320, trigger pull weight about 6 lb, 6 oz.


This message has been edited. Last edited by: sigfreund,




“The fundamental cause of trouble in the world today is that the stupid are cocksure while the intelligent are full of doubt.”
— Bertrand Russell
 
Posts: 44212 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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Interesting data. Out of curiosity, were the extreme upper speeds consistently at the end of the string of fire? Or spread throughout?
 
Posts: 99 | Location: Virginia | Registered: August 03, 2021Reply With QuoteReport This Post
Freethinker
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In the order fired.
Because I had a few shots whose velocities weren't recorded, I had to fire more than 20 and I don't know where in the string they occurred.

1213
1225
1308
1250
1232
1220
1227
1233
1218
1249
1284
1221
1214
1263
1240
1216
1219
1202
1263
1223




“The fundamental cause of trouble in the world today is that the stupid are cocksure while the intelligent are full of doubt.”
— Bertrand Russell
 
Posts: 44212 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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Hmm. Yeah. Random variance.
 
Posts: 99 | Location: Virginia | Registered: August 03, 2021Reply With QuoteReport This Post
Freethinker
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Updated with accuracy test results in first post.




“The fundamental cause of trouble in the world today is that the stupid are cocksure while the intelligent are full of doubt.”
— Bertrand Russell
 
Posts: 44212 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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Thanks again, looks to be very accurate. I'm still of the opinion it was a bargain. My 2nd order is scheduled for delivery today.
 
Posts: 1497 | Location: Oregon | Registered: September 25, 2001Reply With QuoteReport This Post
Freethinker
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It would be interesting to know why the ammunition was “reclassified” and designated not for duty use. It’s obvious that Speer wouldn’t release something for sale that was unsafe to fire, even if there was a “fire at your own risk” warning—which there wasn’t. I have fired a total of 40 rounds of the VAS offering, and although that’s not a huge sample, I experienced no malfunctions or anything unusual with that series. The velocity spread which was greater than the other load I compared it with was more than we’d like, but as I say it wasn’t grossly different from what I’ve seen with other ammunition that I paid full premium price for.

Although I’m speculating, I suspect that even though the ammunition’s pressures didn’t rise to unsafe levels, it may be that their variations exceeded what Speer established as a standard for premium ammunition. My accuracy test was only at 7 yards because at anything much longer my eyes won’t begin to focus on both target and front sight. In fact, because I’m near sighted in my left, nondominant, eye, that’s what I use for shooting tests like this one to help minimize aiming errors. If the ammunition is capable of printing inch or less groups at 7 yards, that should be equivalent to acceptable groups for most purposes at longer distances for anyone with better eyesight or if using a laser aiming aid or optical sight.

Again, whether to rely upon and use the ammunition for any purpose, especially for serious work, is a personal decision, but after my own limited testing I have no reason to doubt anything significant about it.




“The fundamental cause of trouble in the world today is that the stupid are cocksure while the intelligent are full of doubt.”
— Bertrand Russell
 
Posts: 44212 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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Interesting and possible valid ‘speculation’ sigfreund.

Here is a link to Lucky Gunner’s testing of the same round. . .

https://www.luckygunner.com/9m...ot-20-rounds#geltest

. . .and their recorded velocities are lower than yours at 1124, 1135, 1142, 1150 and 1156.

Maybe barrel length and/or environmental conditions can account for the variation?

Rob


__________
"I'd rather have a bottle in front of me than a frontal labotomy."
 
Posts: 3016 | Location: Lehigh Valley, PA | Registered: March 27, 2007Reply With QuoteReport This Post
Freethinker
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quote:
Originally posted by Cookster:
Maybe barrel length and/or environmental conditions can account for the variation?


There are other possibilities, including lot differences, but I’m guessing that barrel length is the primary reason. If the information I could find is correct the M&P9C barrel length is 3.5 inches versus 4.7" for the barrel of the full size P320. If we just take the barrel length ahead of the chamber, the full size P320 barrel is over 1.4 times as long, and that can definitely make a difference in velocity. For example, when I measured the velocity of non-reclassified 124 grain +P Gold Dot from a P365 (3.1"), the average was 1128 fps.

Normally velocities are measured so close to the muzzle that differences in environmental conditions won’t have any detectable effect.




“The fundamental cause of trouble in the world today is that the stupid are cocksure while the intelligent are full of doubt.”
— Bertrand Russell
 
Posts: 44212 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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