To my knowledge, "burl" simply refers to the grain structure or amount of "curl" in wood versus a piece with a straight grain.
Burl - Wikipedia, the free encyclopedia
I see no indication (in the current offerings) that Springfield offers "Burl walnut" as an available option. They simply list "American walnut" as a stock choice. While a piece of American walnut may have a certain amount of "burl" in it, it could also simply have a straight grain.
What I was trying to clarify was this statement:
Originally Posted by Silvertip 44
The loaded rifles are in a heavier and thicker stock. Look on the Springfield web site.
I don't see anything on Springfield's site that mentions any difference in weight or dimensions of their walnut stocks between a std, NM, or Loaded rifle. Therefore - I was wondering where this information came from?
As opposed to this, in reference to the SM:
Additional features include an ultra heavy air gauged Super Match barrel, custom oversized op-rod guide and maximum dimension match grade stocks available in American walnut and McMillan fiberglass.
The SM stock is huge in comparison.