700 ADL Long Action
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.
The sportsman 78 model Remington is the same as a Remington 700 adl, but i have yet to find whether to buy a short or long action stock for mine... so i would just go for a rem 700 adl stock
Should be on the action, Sportsman could be the 48 or 58 semi auto. Sportsman models have little parts left so try not to break any.
1930-1947
They still make a synthetic stock for a model 700
apparently $350
apparently $350
75-400 USD
Action size.
There is no model number 3006 or 243 in the Woodmaster line. Check Remington's webiste under the Sportsman's Library.
Take it to a gunsmith
Take it to a professional