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Posted: 7/25/2001 3:39:36 PM EDT
[#1]
Grains are some leftover from the english system, 7000 per pound.
There are 15.43 grains per gram. +p+ is a hotter load than +p, but I don't know if there are any standards on what constitutes a +p vs a +p+ load. |
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Posted: 7/25/2001 3:44:15 PM EDT
[#2]
P is for SAAMI pressure ratings. +P would be a higher pressure round and +P+ would be even higher than the +P. You would have to check with someone more current on pressure readings and SAAMI to find out how much higher. Bottom line is more velocity for a given cartridge with a given weight.
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Posted: 7/25/2001 4:16:06 PM EDT
[#3]
Because the unit named gram didn't exist when we started measuring-out black powder.
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Posted: 7/25/2001 4:26:03 PM EDT
[#4]
plus a grain is easer to mesure
ie hmm i need .09 grams of poweder vs x grains |
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Posted: 7/25/2001 6:37:50 PM EDT
[#5]
My rather foggy recollection is that there are SAAMI standards for +P cartridges while +P+ (which was originally termed “++P”) simply means the round exceeds all SAAMI standards.
In theory, +P+ is typically limited to law enforcement agencies that use it only in specific firearms that can handle the extra pressure. |
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Posted: 7/25/2001 6:57:27 PM EDT
[#6]
Originally Posted By Zoom Wilson: Because the unit named gram didn't exist when we started measuring-out black powder. Exactly right. This is why we still use the English word "Gauge" instead of centimeter/inch/caliber for shotguns, because of what's inside the shell. Good call, Zoom. [brown]Evil J~[/brown] |
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