i wish to clarify the difference between a bore of a gun and its caliber ,. and even want to know their definations ,. since i am new and young :P
i wish to clarify the difference between a bore of a gun and its caliber ,. and even want to know their definations ,. since i am new and young :P
Dear Wahhaj Ahmad Bro, Welcome to PakGuns forum !
Regards your question; Kindly scroll a bit in intrduction section, you will find your related info.
Regards
A stitch in time saves Nine
Dear Wahhaj Ahmad Bro, Welcome to PakGuns forum !
check out this link,
http://answers.yahoo.com/question/in...=1006042607409
than you mian jee, your link really helped me in making my concept of the matter
bore is diameter of bullet's projectile in inches and calier in mm (i think) correct me
like 7.62*25mm is calber of 30 bor it is 0.30 inches and 7.62 mm projectile and 25mm is lenght of ullet case
LISTEN PLEASE
suppose I have a 7.62/.308 x 51 cartridge
7.62/.308 is the diameter of the bullet
51 mm is the chambering of the bullet
or
the length of the cartridge case is 51 mm
25MM = 1 inch
or
24 MM = 1 inch (precise)
Welcome to PG major o.. Whereabouts in Sahiwal? And share your collection with us.
25.4mm=1 inch (Precise)Originally Posted by major o
25mm is the lenght of bullet case chahy 1inch ya jitna b bany
I brought a vernier caliper to check and still confused.
Last edited by Anjum; 08-03-2012 at 09:41 AM.
”Slow is Smooth & Smooth is Fast”
y confused
"Caliber" refers to the size of the bore, either in inch measurements (.308) or millimeter measurements (7.62mm) "Bore" is a very British term for the size of the chambering, and can be used interchangeably with "caliber" (Although, being an American, the term isn't used very much here, so it's a bit alien). But ".30 bore" and ".30 Caliber" mean the same thing.
This article may help you http://en.wikipedia.org/wiki/Caliber
As others have stated, the full designation for a cartridge may include both the bullet diameter as well as the length of the case (7.62x25mm means a bullet of 7.62mm with a case length of 25mm or 9x19mm is a 9mm bullet in a 19mm long case)
Measure a case from the top of the case mouth, to the base of the case. Measure a bullet across the bottom of it's base. Rifled bores are measured either from the top of the lands, or from the bottom of the grooves. This is why .303 British bullets, or 7.62mm Russian bullets are really around .310-311, and why 7.62 NATO bullets are in fact 7.62mm. Different ways of measuring the bores.
kindly elaborate on grains/grams also
1 gram = 15.4323 grains
E.g a 150grain bullet = 9.72 grams
Means a 115 grains FMJ bullet = 7.45 grams?
- the tool which would teach men their own use would be beyond the price - Plato
Originally "bore" was a British term, specifying the number of round lead balls that would fit in the barrel to make a pound. If it took twelve balls to make a pound, the firearm was a "12 bore." It wasn't a very precise system, but it was simple (by British standards, anyway) and adequate for the time. Later, after rifled barrels became popular, manufacturers started referring to the diameter in decimal inches. This was originally the "lands", or high spots in the rifling, and was easily measured. Later, they began using the diameter across the bottom of the rifling, called the "grooves." But since rifling varied in depth depending on the type of the rifling and who was doing the work, the modern method is to ignore the barrel and refer to the bullet diameter. That's why a .303 British bullet is now a .311" diameter... even though it's still the same size. The European method of referring to cartridges is by diameter, length, and rim type. A 7x57 is a rimless 7mm Mauser, a 7x57R is a rimmed 7mm Mauser, for example. This is a very imprecise system, since there can be many different cartridges of the same diameter and length that do not interchange, by case taper, shoulder configuration, or pressure rating. The usual method in the British Commonwealth and USA is to give each cartridge a unique name to specifically identify the cartridge. This sometimes results in things like the .460 Rowland, which has the same bullet diameter as the .45 ACP, which is actually .451, not .45... well, if it was easy anyone could do it. It's also not unusual for a cartridge to have more than one name. A European might refer to a "7.62x63mm" cartridge. He would have a very hard time finding any in the USA, where the manufacturer calls it ".30-06". The US government used to refer to it as the ".30 Army", but now refers to it as "M2", since they have a new .30 caliber cartridge, which they refer to as 7.62x51 to differentiate it from both the .30-06 and the previous .30 Army, now referred to as .30-40 Krag... You know, you could do a TV game show on this sort of thing. "Rajiv, for ten points, what is the more common name for the .276 Rigby?"
yes sir 7.4518739 grams
Thank you =)
- the tool which would teach men their own use would be beyond the price - Plato
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