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1/25/2018 7:38:29 AM
Posted: 7/25/2001 2:34:22 PM EST
and how many grains in a gram? And one more Q?. I know that +p means a hotter or faster load but why the p, what does it mean exactly and what the diff. between +p and +p+. Thanks.
Link Posted: 7/25/2001 2:39:36 PM EST
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.
Link Posted: 7/25/2001 2:44:15 PM EST
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.
Link Posted: 7/25/2001 3:16:06 PM EST
Because the unit named gram didn't exist when we started measuring-out black powder.
Link Posted: 7/25/2001 3:26:03 PM EST
plus a grain is easer to mesure ie hmm i need .09 grams of poweder vs x grains
Link Posted: 7/25/2001 5:37:50 PM EST
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.
Link Posted: 7/25/2001 5:57:27 PM EST
Originally Posted By Zoom Wilson: Because the unit named gram didn't exist when we started measuring-out black powder.
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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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