They never made anything called a Pioneer...
100-400 USD
Only Remington knows.
Yes
Only Remington knows.
Do not see a 543 in any of my references. Sorry-Sportsman is associated with the Remington centerfire rifles in Model 76, 760, and model 78.
Need a model, serial numbers are not unique accross rifles. RW is Remington Works
Quite a few different ones. Some of the more notorious ones were war souvenir Japanese Arisaka rifles, which had been converted to fire the .257 Roberts, as the Japanese ammunition was a bit scarce on the commercial market. I know the Ruger rifles were made available in .257 Roberts, including the Mk. II and M77, as were the Winchester Model 70, Browning Model 81, and Remington 700. Sako made custom rifles in that calibre, as well.
100-300 USD
Which model?? 100-1000 USD depending on specifics.
the remington model 510 is a 22 plinking rifle used by adults and youth alike. they were not known to have been used by the military, but it's possible.
There is no Remington Model 6 pistol, there has been however cases however of Remington Model 6 rifles converted to pistols by gun or "home" smiths. NOT Remington. As such the value is whatever someone will pay, but generally not much.
The last year of production for the Remington model nylon model 66 was 1990.These rifles were made from 1959-1990 with a total production of 1,050,336.