The Savage firm reference to pre-1908 production is known to collectors as the early Model 1899 featuring a "square" breech-block, referring to the aft area aspect. Below photos of my 1907-08 Model 1899 in 30-30, with such early style configuration. Later 'about' 1908 and subsequent style adopted a convex breech-block. Reducing the "square effect" corners in the receiver to breech-block mating surface. Such less subject to stress cracks emanating in those earlier 90 degree angle junctures. Pix illustrations below! First early style, then later style in 250-3000 chambering.
Concerning "senior guns", my belief of needing due respect for original patterns/chamberings/pressures, etc. With the convex breech-block Savages, being chambered in such 250 Savage, the matter would seem resolved. Such assuming the particular rifle being examined for condition consistent with conversion!
