Taking the figure 1939→END of June 1941 we get: 6+601+462=1067https://ru.wikipedia.org/wiki/152-%D0%BC%D0%BC_%D0%B3%D0%B0%D1%83%D0%B1%D0%B8%D1%86%D0%B0_%D0%BE%D0%B1%D1%80%D0%B0%D0%B7%D1%86%D0%B0_1938_%D0%B3%D0%BE%D0%B4%D0%B0_(%D0%9C-10) wrote:Serial production of M-10 was carried out since December 1939 at plants No. 172 in Molotov and No. 235 in Votkinsk. In connection with the exception of 152-mm howitzers from the divisional artillery and the abolition of infant corps in the summer - in the autumn of 1941, the production of the gun was completed "for the lack of need."
In addition, 204 M-10T guns were produced for the armament of KV-2 tanks (1939 - 4, 1940-100, 1941-100).
Spawning in GC we have: 655RDY+413DAM=1068 →+184Pool=1252 Production in GC we have: 55/turn → 605guns Gives a total of: 1252+605=1857 ...which is about ~500guns or ~40% more then ever been produced. Now, I do not know in how far this gun is supposed to represent/reflect another gun too, since I do not know every Soviet gun which may be similar, but this'd need to be a gun in quite large quantities from the 500 surplus we see, so I doubt it being a replacement in this quantity.
If there is no "representation" then the "correct" figures would need to be:
→ Pool: "0" (as can be seen, the 1939→06/1941 figure are 1068 vs 1067, perfectly matching)
→ Build Limit: "~25" (leading to 275 produced)
→ optional - max imports: 271
...or using another way reachign "correct" figures...
Obv. simplifying that June is 1st halve of 1941 here and assuming Wikipedia is correct.