A user on a russian military forum left these in the thread about this shell. According to him these two pages are from a 1961 german report. He said nothing else about it and didn't respond when another user asked to see the full document, but he left these performance figures derived from live firings: 1000m 120mm/15° 80mm/45° 50mm/50°. (the last one I believe is supposed to be at 60°)
For comparison here are the soviet figures:
New info on BR-365P shell
Re: New info on BR-365P shell
I believe the discrepancy between W.German and the soviet data is because the soviet figures show the perforation limit, while the W.German data show the immunity limit.