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Old December 5, 2021, 10:05 PM   #7
P Flados
Senior Member
 
Join Date: January 8, 2017
Location: Wilmington NC
Posts: 191
I load low power bottle neck rounds using pistol powder a lot.

I can run you some Quickload data, but you left out all of the needed details.

Accuracy of calculated velocity is much better with:
  • Bullet weight & brand if common, weight and length if not common
  • AOL (with info above to get seating depth)
  • Barrel length

I went ahead and ran a couple of powders (faster is better for this type of loading), a 55 gr Speer a random AOL & 16" barrel

Code:
Cartridge          : .223 Rem. (SAAMI)
Bullet             : .224, 55, Speer SP 1047
Useable Case Capaci: 26.819 grain H2O = 1.741 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 16.0 inch = 406.4 mm
Powder             : Hodgdon HP38

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms
-30.0   20     4.20   1417     245   13128   2173    100.0    1.559
-26.7   21     4.40   1456     259   14067   2264    100.0    1.498
-23.3   22     4.60   1493     272   15023   2355    100.0    1.446
-20.0   23     4.80   1529     285   15998   2446    100.0    1.399
-16.7   24     5.00   1564     299   16992   2537    100.0    1.357
-13.3   25     5.20   1598     312   18005   2627    100.0    1.319


Cartridge          : .223 Rem. (SAAMI)
Bullet             : .224, 55, Speer SP 1047
Useable Case Capaci: 26.819 grain H2O = 1.741 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 16.0 inch = 406.4 mm
Powder             : Alliant POWER PISTOL

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms
-12.0   22     4.40   1380     232    9482   2963     98.2    1.708
-08.0   23     4.60   1428     249   10144   3095     98.8    1.646
-04.0   24     4.80   1475     266   10829   3222     99.3    1.590
+00.0   25     5.00   1520     282   11535   3344     99.7    1.539
+04.0   27     5.20   1564     299   12263   3461     99.9    1.492
+08.0   28     5.40   1607     315   13014   3573    100.0    1.449
Now if you are talking 22" barrel the HP 38 numbers are

Code:
Cartridge          : .223 Rem. (SAAMI)
Bullet             : .224, 55, Speer SP 1047
Useable Case Capaci: 26.819 grain H2O = 1.741 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon HP38

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-33.3   19     4.00   1474     265   12206   1436    100.0    1.979
-30.0   20     4.20   1515     280   13128   1499    100.0    1.899
-26.7   21     4.40   1554     295   14067   1561    100.0    1.830
-23.3   22     4.60   1593     310   15023   1624    100.0    1.769
-20.0   23     4.80   1630     325   15998   1686    100.0    1.715
-16.7   24     5.00   1667     339   16992   1748    100.0    1.666

Last edited by P Flados; December 5, 2021 at 10:19 PM.
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