The question can't be answered unless you specify whether you mean centerfire or rimfire.
.22 LR
30-06
375 H&H
270 win
308 win
7.62+39mm
7.62+54R
300 win mag
22 win mag
223 rem
etc.
.22 Long Rifle
In general, some form of a .22 Long rifle. In larger calibers, worldwide, the AK47 is manufacturered by the millions each year.
the most popular right now seems to be 470 nitro express in a double rifle.another is the 416 rigby,with the 458 Winchester another candidate.
None. Weapons and ammunition are illegal in Mexico.
They were made in several calibers- will be marked on the barrel.
700 Nitro, 600 Nitro, 505 Gibbs, 375 H&H Magnum, 460 Weatherby,
They made ammunition in most popular calibers.
Winchester made many rifle models chambered in several .22 calibers.
300 RUM is one
Well over 1000.
300 Win Mag would be one.
Savage manufactured a Model 110 bolt action rifle in several calibers. Very good rifles.
Its all according to what your talking about. In a side arm (pistol) 380, 9mm, 40 and 45ACP / 45 LC in the larger calibers. In a rifle, 243, 270, 30-30, 30-06, 308 and 7mm... The round that has been produced the most is the 22LR...