As far as I know Tula only made the 100,000 in 1944. I would personally need to see pics of a 43 Tula m44 before i believed it. That would be a VERY valuable rifle. The only 1943 m44s i know of is the Izhevsk built rifles that only numbered 50,000
Also these factories made lots of things, I think Tula also made trucks and parts for other things as well. So maybe firearm production slow in order to fill in other demands for the military.