that doesn't mean that Savage didn't make the change earlier. Heck, the #63 catalog might have come out in mid-1926 as far as I know rather than 1927.
The #63 catalogs I have lists the 30-30 as 20" for the 99-E, F & G and 22" for the 99-C & D. A Jan 3, 1927 Jobber's price list has them at 22" and no longer has the 99-C or -D listed.
I think catalog # 63 had to come out sometime in late1924. All I have seen still show the Model 1914 pump with later ones having it marked 'replaced with the Model 25' - I don't have an exact date for the introduction of the Model 25 but a Jan 2, 1925 Wholesale price list has it listed. I have one with a rouges gallery cover with an undated price list still having the 1914, another rouges gallery with undated price list with the Model 1925 and a later bear cover #63 with a Model 25 insert page dated Nov 4, 1926.
