Author Topic: Load Testing - Alliant Sport Pistol powder  (Read 21033 times)

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Offline rotorwind

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Re: Alliant Sport Pistol powder
« Reply #75 on: March 09, 2018, 11:49:52 PM »
I finally bought my self a chrono and was able to get the range today for some testing. I tested Sport Pistol along with my previous Tite Group loads. I used mixed range brass, CCI SP primers, and Precision Delta 124gr JHP @ OAL of 1.095 +/- .002 shot outta my SP-01.

Sport Pistol at 4.0gr ( 5 rounds )

AVG 1078
StdDev 8.46
Min 1067
Max 1088
Spread 21

Sport Pistol at 4.1gr ( 5 rounds )

AVG 1093
StdDev 14.95
Min 1079
Max 1117
Spread 38

Tite Group at 3.9gr ( 5 rounds )

AVG 1103.2
StdDev 11.95
Min 1086
Max 1115
Spread 29

Tite Group at 4.0gr ( 5 rounds )

AVG 1109
StdDev 14.94
Min 1092
Max 1129
Spread 37

Thought it was interesting there was wasn't much difference between the two TG loads. I am thinking I can drop the SP down to 3.8. I will make a 5 round at batch at 3.7, 3.8 and 3.9 to see what I get.


Awesome report.   Look forward to hearing about your reduced SP loads


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Offline 1SOW

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Re: Alliant Sport Pistol powder
« Reply #76 on: March 09, 2018, 11:54:48 PM »
Interesting that your 124 PD JHP @ 1.095" (Same OAL I use with the same bullets) with 4.0 grs of SP gives 133.6 PF.
Mine with 4.1 grs of Vit n320 give about 132+ PF. --- my comp. load.

Offline IDescribe

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Re: Alliant Sport Pistol powder
« Reply #77 on: March 10, 2018, 01:44:02 AM »
My testing of strings of different lengths suggests that there is a significant difference in average velocity of strings of 5 rounds vs 10 rounds, but not much difference between 10 rounds and 20 rounds:  I run 10 round ladders as a result.  Food for thought.  :)

Offline copemech

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Re: Alliant Sport Pistol powder
« Reply #78 on: March 10, 2018, 02:07:25 AM »
My testing of strings of different lengths suggests that there is a significant difference in average velocity of strings of 5 rounds vs 10 rounds, but not much difference between 10 rounds and 20 rounds:  I run 10 round ladders as a result.  Food for thought.  :)

to get a better sample average, 5 is not telling the whole story sometimes, yet as a quickie it gets you pointed in the right direction

Offline Wobbly

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Re: Alliant Sport Pistol powder
« Reply #79 on: March 10, 2018, 08:08:19 AM »
I start with 6 round groups to get me in the ballpark. Then go back and re-visit with 10+ round groups when I know a little more.
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Offline jmh013

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Re: Alliant Sport Pistol powder
« Reply #80 on: March 10, 2018, 05:40:16 PM »
My testing of strings of different lengths suggests that there is a significant difference in average velocity of strings of 5 rounds vs 10 rounds, but not much difference between 10 rounds and 20 rounds:  I run 10 round ladders as a result.  Food for thought.  :)

I will make 10 round batches ranging from 3.7 thru 4.1 for next week. If I am gonna do it I prefer to get as much data as possible and do it right. I am very green at testing rounds and developing loads, would elevation affect the velocity of the same load specifications? I am testing these rounds in Denver area.

Offline Wobbly

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Re: Alliant Sport Pistol powder
« Reply #81 on: March 10, 2018, 06:29:46 PM »
...would elevation affect the velocity of the same load specifications? I am testing these rounds in Denver area.

Elevation, humidity, temperature, brand of brass, primers, distance, bullet, type of chrono, gun, number of cups of coffee while loading, and 100 other variables all figure into the final figures. All you can do is be as careful as you can and report as many of these as you can think of.
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Offline Wobbly

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Re: Alliant Sport Pistol
« Reply #82 on: March 10, 2018, 06:32:27 PM »
I'll report back on Sunday with results.


Anti-2A weatherman says I won't be testing anything outside tomorrow. 

 :P
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Offline IDescribe

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Re: Alliant Sport Pistol
« Reply #83 on: March 10, 2018, 09:29:56 PM »
I'll report back on Sunday with results.


Anti-2A weatherman says I won't be testing anything outside tomorrow. 

 :P

You might want to record the number of cups of coffee you had while loading now.  You might not remember by the time you get to shoot these.  ;)

Moken

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Re: Alliant Sport Pistol powder
« Reply #84 on: March 11, 2018, 12:35:31 PM »
Has anyone established where SP is on the burn rate chart? Interested for 9mm.

Offline painter

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Re: Alliant Sport Pistol powder
« Reply #85 on: March 11, 2018, 04:59:44 PM »
Has anyone established where SP is on the burn rate chart? Interested for 9mm.
I haven't found it on any burn rate charts.

Alliant calls it medium-fast.
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Offline IDescribe

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Re: Alliant Sport Pistol powder
« Reply #86 on: March 11, 2018, 05:26:38 PM »
It?s somewhere between N320 and W231/HP38

Offline painter

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Re: Alliant Sport Pistol powder
« Reply #87 on: March 11, 2018, 05:30:29 PM »
It?s somewhere between N320 and W231/HP38
Is that published, or reported?
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Moken

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Re: Alliant Sport Pistol powder
« Reply #88 on: March 11, 2018, 05:38:24 PM »
It?s somewhere between N320 and W231/HP38
Thanks for the reply. Wow! Even faster than Unique. Interesting. Can't wait to see more range reports. That in my opinion points to its effciency. I was curious seeing the velocity with relatively low charge weight.
Very interested.

Offline Scarlett Pistol

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Re: Alliant Sport Pistol powder
« Reply #89 on: March 11, 2018, 09:35:44 PM »
I posted pictures earlier on in this thread showing how clean Sport Pistol burns. I?ve run over 2k rounds since then and most were through my SP-01. I?ve cleaned my barrel once, the feed ramp twice. Nothing else in it has been cleaned. No malfunctions and it?s way cleaner than any other time I?ve done this. This is the powder for Joe L!
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