have a gunsmith do this, push a slug of close dia through the rifle, and micrometer the bullet. this will give the true bore size.
Bore diameters vary from gun to gun due to wear reduction of the boring tools and to accurately find he bore diameter you must "Slug the barrel". In most cases, it is safe to use bullets of the same diameter as those used by the factory when making ammunition.
You should slug the barrel to determine the actual bore size (lands and groove diameter) to ascertain the actual diameter of bullet the rifle uses. Selecting a resizing (swaging) die for that diameter will give you the best accuracy. All sizes of swaging die are available through RCBS.
ammunition means "to be fired from a gun" so slug ammunition means they use it as a bullet ,or with one ,or maybe they have a bullet as a shape of a slug
Slug could be a snail like animal. It could also mean one heavy bullet.
Caliber is the diameter of the bore of a firearm. It's expressed in hundredths or thousandths of an inch, as in .45 caliber or .380 caliber. Curiously, the actual diameter of a .38 caliber slug is 0.357 inch.
of Slug
A 12ga Winchester rifled Foster slug averages .713" in diameter
No standard abbreviation
I think what you're asking is:Is a .410 bullet a 20 gauge bullet??Well, most shotguns are sized using the Gauge nomenclature. Generally, gauge answers:"How many lead spheres of this diameter are needed to equal a pound?"So, the larger the diameter, the larger the spheres of lead, the fewer are needed to equal a pound. So that is why the gauge system is inverted (lower number equals a larger bore: a 12 gauge has a larger diameter than a 20 gauge.There is a shotgun size that does NOT use gauge, it uses caliber (like a bullet). This exception is the .410 shotgun--The .410 is 41/100ths of an inch, or roughly .41 caliber.Also, shotguns usually propel several projectiles at once (called shot). This can range from the size of sand grains to marble sized pellets. Some shotgun cartridges fire a single chunk of lead which is called a SLUG (not a bullet).So to answer your (cleaned-up) question, a .410 slug is much much smaller than a 20 gauge slug. A rough estimate is that a .410 barrel is roughly 68 gauge, while a 20 gauge is roughly .60 caliber.
A single, non-rifled projectile shot out of a rifled bore shotgun (specifically a slug gun).
No- with the possible exception of some primitive muzzleloading hand cannon. That would fire a bullet nearly an inch in diameter- bigger than a 12 g shotgun slug.
Yes.