Like others have said the M38 Carbine was never used with a bayonet. The bayonet can be placed on one, but historically was not used with one.
As for the tightness of the bayonet fit. Part of the reason for this is because once the bayonet was installed on a 91/30, it was not intended to be taken off. That is to say, it was not intended to be taken off and on at will. Soviet soldiers were never issued bayonet sheaths for that reason, but were expected to keep their bayos installed at all times.
The M44, though it has a folding bayonet, was always kept in the unfolded position. M44s (actually ALL Mosins with the exception of the M38) were zeroed with the bayo installed or extended. Soviet soldiers folded the bayonet on the M44 only when traveling in a truck, or while the rifle was cleared and sitting on a rack not being used or possibly needed for immediate use.
The two symbols on your solvent tins are...W=Solvent, H=Lubricant.
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