Cannot dump NES/Famicom in correct size with auto mapper?

[p0ojisan]

I've just built HW5 as my third OSCR. In testing with variaous carts, I found an issue when dumping Famicom cart, Akumajou Densetsu.

According to header DB, this cart is mapper 24, 256K PRG, 128K CHR size, as my brandnew OSCR detects just like that correctly. But, I got CRC error after dump.

OSCR HW5 V14.3

[+] NES/Famicom


Searching database
for B5FE7743 or 5F99D75D...

NES CART READER

CURRENT SETTINGS

MAPPER:   24
PRG SIZE: 256K
CHR SIZE: 128K
RAM SIZE: 0K

Press Button...

[+] Read iNES Rom


Saving to NES/ROM/AkumajouDensets/49/...
[*******************]
CRC32... 55832E11 -> Not found

Press Button...

And also, I found that a dumped file is 262,160 Bytes, though I expected around 384(=256+128) KB.

Another weird. I also tried the same cart with my first and second OSCR and got different result.

1st: HW3 v8.3 + FC Adapter -> Can dump successfully, though I needed to designate correct mapper/size
2nd: HW3 v14.3 + FC Adapter -> Cannot dump correctly. CRC is 55832E11, and file size is 262,160 bytes again.

From these results, I believe my adapter doesn't have defects and also the third(=HW5) is working same as the second (HW3).

Is the latest auto-mapper working well? Any help?