Well, it all depends on which rounds you want to feed into the tube magazine. The Model 512 will shoot .22 short, long and long rifle cartridges, so if you put a mixture of .22 caliber cartridges in the magazine tube, the number of cartridges it will hold will vary. You can add one more round if you include a cartridge in the chamber.
Depending on caliber, the fixed internal magazine holds three, four, five, or six rounds. The police DM model has a detachable magazine.
You can request an owner's manual for free at Remington's web site. 10
The Remington 700 BDL in caliber .22-250 typically has a magazine capacity of 4 rounds. However, this can vary based on specific model variations and state regulations. Always refer to the manufacturer's specifications for the particular model in question.
According to Remington 60,000 from 1967-1987.
6 rounds
5
No way to answer without knowing what gauge and what loads you are talking about
depending on what you want to know the Remington model740 is the previous model b4 the Remington 742 they were chambered in many calibers for deer hunting and had a 5 rd clip
13 rounds of .44-40 ammunition.
Only Remington knows.
I believe that the marlin model 783 holds 7 rounds.
Your winchester model 1400 holds 3 rounds of ammo.(1 in the chamber,and 2 in the magazine.)