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Are these numbers accurate?
- Thread starter Meiji_man
- Start date
I haven't confirmed any of the above - but based on my years of handloading I wouldn't dis-believe them.
The .32 Auto is a fairly strong case and in a strong gun the velocities cited aren't unreasonable. (With the right powder and barrel length.)
I'll admit that the 60 grainer at 1,200 fps is pushing my credulity if we're talking 3 inch (or so) barrels.
Keep in mind that light bullets at high velocities are really short range phenomenah (sp?). The lighter the slug, the faster the velocity loss.
The .32 Auto is a fairly strong case and in a strong gun the velocities cited aren't unreasonable. (With the right powder and barrel length.)
I'll admit that the 60 grainer at 1,200 fps is pushing my credulity if we're talking 3 inch (or so) barrels.
Keep in mind that light bullets at high velocities are really short range phenomenah (sp?). The lighter the slug, the faster the velocity loss.
I have to agree with JimFox, I have grave doubts about 200+ FP with a .32ACP out of a short barreled gun. I think 130-140 FP is about all you can expect. I may have to pick up some of those 60gr HP's and run them past my chrony to see what they really clock in at. I'll be astonished if they exceed 1000 FPS.
The calculations are correct, but I do question the "real world" velocity figures.
You can use the following gun math calculator to double check your findings:
http://www.realguns.com/math/cal4.htm
Good Luck...
Joe
------------------
Go NRA
You can use the following gun math calculator to double check your findings:
http://www.realguns.com/math/cal4.htm
Good Luck...
Joe
------------------
Go NRA
From GoldenLoki Pages at www.geocities.com/goldenloki/ktpistol/ktpistol.html Brand grain advertised ave fps ave fpe std dev
Magsafe #32X pfb 36 1450 / 168 1313.0 137.8 49.8
RBCD pfb 37 1815 / 271
Glaser pfb 55 1300 / 206
Cor Bon jhp 60 1050 / 150 1023.8 139.7 15.0
Fiocchi jhp 60 1200 / 192 968.0 124.9 21.8
Hornady XTP jhp 60 1000 / 133 861.1 98.8 28.4
Winchester ST jhp 60 970 / 107 845.8 95.3 32.0
Speer Gold Dot jhp 60 960 / 123 789.7 83.1 25.6
Fed Hydra-Shok jhp 65 950 / 130 818.4 96.7 24.8
Full Metal Jacket
Hornady fmj 71 900 / 128
Winchester fmj 71 905 / 129 790.3 98.5 15.8
Sellier & Bellot fmj 73 1043 / 176 910.7 134.5 31.2
Fiocchi fmj 73 980 / 155 857.3 119.2 24.8
FN jfn 73 na 788.1 100.7 19.3 One of these days I might learn to make these charts line up. John. (Later)Oops, forgot to say that this info. is listed on his page under P-32. JT
[This message has been edited by johnbt (edited June 22, 2000).]
Magsafe #32X pfb 36 1450 / 168 1313.0 137.8 49.8
RBCD pfb 37 1815 / 271
Glaser pfb 55 1300 / 206
Cor Bon jhp 60 1050 / 150 1023.8 139.7 15.0
Fiocchi jhp 60 1200 / 192 968.0 124.9 21.8
Hornady XTP jhp 60 1000 / 133 861.1 98.8 28.4
Winchester ST jhp 60 970 / 107 845.8 95.3 32.0
Speer Gold Dot jhp 60 960 / 123 789.7 83.1 25.6
Fed Hydra-Shok jhp 65 950 / 130 818.4 96.7 24.8
Full Metal Jacket
Hornady fmj 71 900 / 128
Winchester fmj 71 905 / 129 790.3 98.5 15.8
Sellier & Bellot fmj 73 1043 / 176 910.7 134.5 31.2
Fiocchi fmj 73 980 / 155 857.3 119.2 24.8
FN jfn 73 na 788.1 100.7 19.3 One of these days I might learn to make these charts line up. John. (Later)Oops, forgot to say that this info. is listed on his page under P-32. JT
[This message has been edited by johnbt (edited June 22, 2000).]