| Bullet Type | Speer 90 grain Gold Dot JHP |
| Case | Starline |
| Primer | Winchester WSP |
| Cartridge Overall Length | 24.5 mm |
| Powder Charge (gr) | MV (ft/s) | Std Dev (ft/s) | ME (ft-lbs) |
Comments
|
5.9
|
905
|
53.7
|
173
|
Not very good consistency
|
6.1
|
903
|
36.8
|
191
|
Again, not as good as the Sierra loads.
|
6.4
|
1099
|
35.3
|
268
|
COAL 23.7mm - See note (1).
|
6.4
|
1044
|
43.7
|
218
|
COAL 23.7mm - See note (2).
| |
General Comments:
For a reason I cannot yet explain, the Speer Gold Dot did give the same
consistency as other 90-95 gr bullets loaded with the same powder charge. Some
possible explanations include slightly different bullet diameter, different
bullet shape (more rounded rather than a truncated cone), and different
seating depth.
A later test (6.1 gr) confirms this. The average velocity is 60-80 ft/s less than the comparable Sierra bullets and the consistency is not as good. I can only speculate that the bullet is slightly undersized (say .363" rather than .365") and thus exhibits blow-by (gases blowing by the bullet because of an improper seal). I have not tried a high-precision caliper on the bullets...might be something to try.
(1) This load was fired from a Russian Makarov with Federal extended threaded
barrel and "profile brake" muzzle flip compensator. Even with the tighter bore
of the Federal barrel, consistency was not terribly good.
(2) Same as load in above line, but fired from East German Makarov. Note the small change in muzzle velocity between the longer/tighter barrel and the stock East German barrel. This gives some insight what type of effect blow-by has. Compare this result to the HS6 LRN load and you'll quickly realize why lead bullets are so much better for your gun than jacketed.
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