Posted: 12/14/2006 3:06:13 AM EDT
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Does it refer to bullet weight or density or size? How does a 230 grain .45 HP differ from a 230 grain .45 FMJ reguarding grain, concidering the HP has a big hole boared in it? Denser allows? Bigger bullet to make up for lost space from the hollow tip? Also, does 230 actually mean 230 or is it simply a label for a certain class of bullet? What I mean is, is grain measurement like caliber where a .38 is actually .357 inches and a .44 is actually .429, ect. |
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Grain is a measurement of weight. Here is what wiki says about it. As far as the same weight bullet in FMJ and HP I think that the length of the hp is longer and sits farther back in the case. But I am not sure about that. |
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I know we all have to learn these things eventually, but 326 posts without picking this stuff up? Wow. A grain is 1/7000 of a pound. It is a fairly stupid measure of weight if you ask me, but considering my distaste for the metric system I don't really see other options. A 230 grain bullet weights 230/7000 of a pound. Naturally there may be variations in bullet weight, especially if you are going for the cheap stuff, but generally the listed weight is accurate to within .5 of a grain. Of course, some of the "exotic" ammo manufacturers may err alter the information about their bullet weights somewhat, just to make them seem more consistent. |
I waste a lot of time on the general board discussing beer, camel toes, and current events. 
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I cannot find it...but I remember a grain came from 7000 grains of barley weighed one pound... Found a reference: http://www.moah.org/exhibits/archives/measure.html <snip>The Roman "Libra" (which gives us the abbreviation lb. ) was defined as the weight of 7680 grains of wheat, fixing the grain as the basic measure. King Henry VIII went on to define the avoirdupois pound as 7000 grains. The French defined the troy pound (from Troyes, France, an important trading center in the Middle Ages) as 5760 grains for use in weighing jewels and precious metals. ....In the Middle Ages, almost every town had its own standards of weights and measures, and there were variations between those of one trade and another. As late as the 18th century in Italy there were more than 200 units of length called the "foot". <snip> |
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Weight is weight (as explained). Any bullet for 45acp that weighs 230 gr will vary in length depending on style. hollow points or bullets of various nose shape will have different lengths. Most pistol bullets are pretty much the same density,generally close to that of more or less pure lead.Most jacketed bullets are fairly soft lead coated with jacket material which is a fairly small percentage of total weight. Cast Lead pistol bullets will vary somewhat as the lead alloy is messed with to get different hardness but this would only be a percentage point or two. There are a few more or less exotic pistol and rifle bullets made of something other than mostly lead. Some of the special self defense loads such as magsafe have some weird makeup and some of the extra special purpose hunting loads for dangerious large game are sometimes made of strange alloys (bronze solids ect) |
Given their driving, that surprises me little about Italy. Ha, ok Angelshare. As long as you were doing somthing productive |
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I believe 437 grains is roughly 1 oz. Hope this helps. I uses it when describing to new shooters how heavy a bullet is. (ie 230 grain .45 is a little over .5 oz). Hopes this helps. It brings a little more understanding to those who just buy ammo and not thinking about the weight of the projectile they are sending at there target. LittleLamb |