Your question is a bit ambiguous, so I'll go with the notion you're referring to the longest confirmed kill by a sniper. That was achieved with a rifle chambered in .338 Lapua Magnum.
The 7.7 Jap rifle is just that, a 7.7 mm rifle used in WWII, bolt action using 7.7 mm ammo. My dad brought one back from the war and I have had it ever since. I bought ammo for it years ago an have fired it. I found it to be very accurate.
No
Absolutely. In fact it's my understanding that they actually made 2 types. Their first .22 rifle used "caseless" .22 caliber ammo. I've only read about these rifles however I own the 2nd type they manufactured. It's a semi-automatic rifle (if you're a novice that means it fires one round every time you pull the trigger) that fires standard .22 caliber long-rifle ammo. The rifle holds one round in the chamber and 7 rounds in the clip. I bought this rifle at a store called Merchandise Mart which was located in Southgate, MI a suburb of Detroit. In the early '90's the store was having a "going out of business sale" and I purchased the rifle for $23.00, which was less than you could buy a Daisy pellet rifle for at the time. I still have the rifle, new in its box and never loaded let alone fired. But they most certainly did make such items!
@ 2000 and 2400 M
In guns including firearms, caliber or calibre is the approximate diameter of the barrel and by extension the projectile used in it, measured in inches or millimetres. The 20mm caliber ammo is the biggest one in production.
Yes
No. But there WAS a submachinegun in caliber .22 Long rifle that fired 1200 rounds per minute, known as the American 180.
NO NO NO. Please don't ever try to fire rifle ammo from a shotgun!
Accurate and effective to about 175-200 yards.
Can't be answered without knowing who made it, caliber/gauge, action, type of ammo used.
use hoppes bore snake in 22 caliber best i have ever used
Yes. Some are stamped Stevens by Savage Arms Co.