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
According to Remington 60,000 from 1967-1987.
6 rounds
5
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
No way to answer without knowing what gauge and what loads you are talking about
13 rounds of .44-40 ammunition.
Your winchester model 1400 holds 3 rounds of ammo.(1 in the chamber,and 2 in the magazine.)
I believe that the marlin model 783 holds 7 rounds.
Only Remington knows.
Depends on the model