The Loads Contained Herein are NOT TESTED! They are Calculated for DiSCUSSION purposes ONLY!
Using “QuickLOAD” software on the ,25ALS cartridge design (Ammoguide Cartridge file #958) and a Hornady #2510 Bullet in the calculations to develop a Charge Variables table.
Cartridge Data entered:
Bullet = .250” sized dia. 60 grain Hornady 2510 semi jacketed Soft Flat Point.
Cartridge = .25 Automatic Long Stevens of 1.125” case Length. H2O cap. = 12.11 est.
OAL = 1.395”; Bullet Length = 0.544”; Shank Seating Depth = 0.274”;
Barrel Groove diameter = 0.251”; Barrel length (breech face to muzzle) = 12”;
Bullet Travel = 11.149”.
Pmax (MAP) = 25000psi; Measure method =piezo CIP;
Cross Sectional Bore Area = .048267 Sq. In.; Volume Occupied by Seated Bullet = 3.439 grains H2O; Usable case Capacity 8.667 Grains; weighting Factor = 0.75.
Propellant data Entered (other than supplied by QuickLOAD file)
Hodgdon H110 Propellant; Shot start Pressure = 2900psi; Charge weight = 8.0 grains; 93.2 % fill.
Step% Fill% Charge(grains) Vel(fps) Energy (ft.lbs) Pmax(psi) Pmaz(psi)
-10 84 7.20 1425 270 16132 2703
-08 86 7.36 1459 284 17083 2805
-06 88 7.52 1494 297 18091 2707
-04 90 7.68 1530 312 19170 3010
-02 91 7.84 1565 326 20325 3114
Nom. 93 8.00 1601 342 21562 3217
+02 95 8.16 1638 357 22888 3320
+04 97 8.32 1675 374 24312 3423
+06 99 8.48 1712 390 25831 3526
The Calculated steps below -10% and above +06% are deleted from consideration.
Questions for consideration:
1. Is this Propellant within its SAFE working area in this application?
2. Would the low end Weight be a SAFE Starting Charge for this Propellant?
3. Is this Bullet Heavy enough for caliber to ‘work’ with this propellant successfully?
From past testing, I have found that the Revolver that I use performs about 2.1 percent BELOW Specified Muzzle Velocity when measured about 5 yards from the muzzle, using CIP Standard Controlled commercial Ammo as a reference Cartridge.
Best Regards,
Chev. William