Your rifle shoots short, long, and long rifle, and unlike most bolt action rifles has a fifteen round magazine. (very unusual for a bolt action)
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I have read that round-nose lead bullets work best in a 512. Others may not feed properly. I have never used any other kind, so I cannot vouch for that.
There is no "Remington USA 1906" rifle although there is the Remington Model 8, which was introduced in 1906. This is a semi automatic rifle that was chambered for one of four possible calibers; .25 Remington, .30 Remington, .32 Remington, or .35 Remington. The caliber that your rifle is chambered for should be stamped on the side of the barrel, just forward of the receiver.
Remington .270, 150 grain.
Type your answer here... how do I adjust the trigger on Remington 799
If you're talking about the Japanese Arisaka Type 99 rifle, no.
22 Long Rifle
A model 742 magazine
30/06, 150 grain
The caliber of ammunition the rifle uses is usually roll-stamped on the right side of the barrel, just in front of the receiver. For example: if it says "7mm Remington (Rem.) magnum (mag.) you would need to buy that type of ammunition as sold by Remington, Federal or any of the other companies offering this type of ammo in whichever bullet weight you prefer to shoot.
The barrel should be stamped 30-30 winchester.
You may use any brand of 7mm Magnum rifle ammo.
most minis are .223 caliber aka 5.6 NATO <><><><><> Although similar, the .223 Remington and the 5.56x45 are NOT the same cartridge. A rifle chambered for 5.56 can shoot .223 safely. The reverse is not true- a rifle chambered for .223 MAY be unsafe with 5.56 ammo- it has a slightly longer cartridge case, and is loaded to higher pressures. Safe bet is to check the caliber marked on the firearm, and stick with that.
You need to submit the kind of firearm is it? Pistol, rifle, shotgun?