Chrono Observations - Results

[MadDuner]

After reloading for my shooting addiction, and loading thousands of bullets.... last weekend I finally bought a chronograph.  So of course - today I had to take it out and test my new piece of equipment.  This equipment is a Chrony M-1 Master.  It’s wired remote display reads in meters per second.  That’s OK though - I have a calculator.

The true purpose of this exercise was to figure out my ammo choice - reloaded by me - to run in a suppressed Scorpion.  I am looking for best accuracy while sub-sonic,  This search also had me chasing my tail when comparing groups at 100 yds.  I added a real scope to aid my efforts.  The only thing it helped me do is see that my previous outing with a RDS was pure lucky grouping!  I called my Scorpion a tack drive then.  Not so today!  We had a good gusting cross wind, which appeared to hurt my groups some.  I will also list my resulting group size, but apologize for not documenting it with photos.  We all know photos are more interesting,

I shot a handful of different weights, some factory and some reloads.  I shot each through my SP-01 Tactical, my Sig P290RS, and my Scorpion Evo S3 Carbine with 16” barrel.  This helped me identify the speed difference derived from different barrel lengths.  Each ammo type and gun was fired 5 times and the results averaged.  I was surprised by the differences in registered speed between shots for the factory loaded ammo.  My reloads only varied by 1 or 2 meters per foot.  The numbers are first meters per second - then feet per second.

S&B
115gr SP-01 365 - 1197
115gr P290RS. 333 - 1092
115gr Scorpion. 425 - 1394 4 MOA

Berry’s & Titegroup Handload
115gr 5.0 SP-01 382 - 1253
115gr 5.0 P290RS 351 - 1151
115gr 5.0 Scorpion 440 - 1443 3 MOA

Blazer
124gr SP-01 360 - 1181
124gr P290RS 302 - 990
124gr Scorpion 422 - 1384 3 MOA

Federal Syntech
124gr SP-01 370 - 1214
124gr P290RS 303 - 994
124gr Scorpion. 428 - 1404 2.5 MOA

Federal
124+P HST SP-01 366 - 1200
124+P HST P290RS 298 - 977
124+P HST Scorpion 415 - 1361 5 MOA

Berry’s & TiteGroup Handload
147gr 3.2 Scorpion 308 - 1010 2 MOA
147gr 3.3 Scorpion 312 - 1023
147gr 3.4 Scorpion 322 - 1056
147gr 3.5 Scorpion 334 - 1095 2 MOA

UNAC
165gr Scorpion 274 - 899 3 MOA

And just because I measured it.......
22 LR S&W pistol 348 - 1141
22 LR Martin Rifle 375 - 1230

To those with chronographs.... do these results match yours?

[Wobbly]

Sorry I can't make heads of tails of your data.  We have a template in the Stickies for reporting data that will help make it clear.

[MadDuner]

Sorry I can't make heads of tails of your data.  We have a template in the Stickies for reporting data that will help make it clear.

Sorry Wobbly.
I’ll look for the template.

This data is cut and pasted from my notes that I put on my phone.
All handloads are with Tite Group. OAL of 1.145.  All round nose Berry’s.

Type of ammo,
weight of projectile, powder charge, what it was shot from, speed in meters, speed in feet.

Group size (MOA) from Scorpion only.

I’ll look for the template and reformat.

[MadDuner]

Caliber:  [9x19 Luger]
Bullets:  [Berry’s 124gr Round Nose]
Brass:  [Mixed]
Powder:  [Hogden TiteGroup]
Max Velocity:  [1250]fps
Primer:  [Remington 1 1/2 Small Pistol]
OAL:  [1.145"]
Rifle:  [CZ Scorpion Evo S3 Carbine 16” Barrel]
Qty:  [5 rounds each, slow fired]
Weather:  [85F Sunny, 10mph gusting cross-winds]
Chrono:  [Chrony M1 Master]

Load      Avg Vel           
3.2gr        1010             
3.3           1023             
3.4           1056             
3.5           1095             

NOTES 
This series of loads all produced 2MOA groups at 100 yds regardless of velocity.
My goal was to be as fast and heavy as possible while remaining subsonic.
All results of 5-Shot groups were within 2 meters, or 6 FPS - with mixed brass.

[MadDuner]

Caliber:  [9x19 Luger]
Bullets:  [Berry’s 115gr Round Nose]
Brass:  [Mixed]
Powder:  [Hogden TiteGroup]
Max Velocity:  [1250]fps
Primer:  [Remington 1 1/2 Small Pistol]
OAL:  [1.145"]
Pistol:  CZ Scorpion Carbine 16” Barrel]
Qty:  [5 rounds each, slow fired]
Weather:  [85F Sunny, 10mpg gusting cross-winds]
Chrono:  [Chrony M1 Master]

Load      Avg Vel                     
5.0gr       1443             

NOTES 
This load/projectile combo produced 3MOA groups at 100 yds.
This combo is overloaded according to recommended weight and velocity in this application.
There is no reason to pursue this load for my Scorpion.

I originally produced this load to duplicate the felt recoil of +P Defensive ammo, but stopped loading it when concerns of over-speed and over-pressure were brought to my attention.  Now that I can chronograph my loads - I can see I am right at max velocity for the shorter barrel applications.

When used in a CZ 75 SP-01 Tactical, this load produced a velocity of 1253 FPS - so right at max for this application.

When used in a Sig Sauer P290RS, this load produced a velocity of 1151 FPS.