So I ask: How do TMA and its members relate to NMLRA?
There is no "relationship' between the TMA and the NMLRA.
Although some of our members belong to both organizations.
Does TMA see itself as supplementing NMLRA or supplanting it?
Neither actually.
What was in the minds of the founders of TMA, a repudiation of or alternative to NMLRA or a symbiotic effort to focus your personal energies on >traditional< muzzleloading in harmony with the larger, more diverse organization?
Please take notice of the word "traditional" in the TMA's name, that in itself defines how the TMA and the NMLRA differ.
Also,.... the TMA's dedication to traditional muzzleloading discourages the involvement, or inclusion, of such (non-traditional) things as modern, plastic sabots, inlines, scopes, and etc., all of which are acceptable to the NMLRA.
I hope this answers the questions you asked, and if not, I'm sure other TMA "founders" will expand on what I've said.
Corporation BY-LAWS of:
TRADITIONAL MUZZLELOADING ASSOCIATION, INC.
ARTICLE I
MISSION STATEMENT, DEDICATION
Section 1. MISSION STATEMENT. It is the mission of the Traditional Muzzleloading Association to endorse and promote the use of all traditional muzzle loading rifles, muskets, smoothbores, cannons and pistols, using flint, percussion cap, match and fuse ignition, only, as the case may be.
The Traditional Muzzleloading Association defines a "traditional muzzleloader” as one being the same, or similar, in design, function, materials and components to those used in the construction of original muzzle loading firearms prior to the year A.D. 1900.
TRADITIONAL MUZZLELOADING ASSOCIATION, INC.