1944-45 Soviet 100 mm BR-412 use

[Miles Krogfus]

These two March 1945 documents show the BR-412 sharp nose AP in use both by the SU-100 and 100 mm artillery. The BR-412 B APBC model was not with combat units.

[Stiltzkin]

The information on the specifications of the "BS-3" and SU-100 have been gathered from a fallen officers diary and were also based on captured firing tables.

[Peasant]

These two March 1945 documents show the BR-412 sharp nose AP in use both by the SU-100 and 100 mm artillery. The BR-412 B APBC model was not with combat units.

This information is consistent with what I've read in russian sources. They all agree that the BR-412B shell entered service very late or even after the war has ended. But I stand by my previous assessment, that the new 122mm BR-471B shells reached the frontline units by the summer/autumn of 1944.

[Contender]

This information is consistent with what I've read in russian sources. They all agree that the BR-412B shell entered service very late or even after the war has ended. But I stand by my previous assessment, that the new 122mm BR-471B shells reached the frontline units by the summer/autumn of 1944.

I think is probably the hang up is when production or at least the order for production started vs when they were actually produced or delivered. Many soviet sources want to give a date of January to "spring" however none that I know of actually state when if at all these rounds were delivered, how many were allegedly produced during the war, of those how many were delivered and to which units. This reminds me a little of the old discussions of whether the T-44 saw service in WWII since the T-44 was "officially adopted". In any case I think other than for testing its highly improbable for these rounds to have seen service, their absence from the documentation provided by Miles Krogfus certainly implies their absence as do other bits of russian data, if you recall my book excerpt.
Perhaps looking at WWII era soviet optics for the AFV's armed with 100 mm & 122 mm might provide some evidence? As I would imagine they would have a unique range scale for the capped shell.