Hello,
HD bombs doesn't seem model allowed release envelope.
Especially SNAKEEYEs (MOD 3A, 4) have rather tight release envelope (450-500 kcas).
>500kcas is structural limit of retarding fins and <450kcas would case fins only partially opening.
This result in bomb impacting long and may increase chance of self fragmentation.
In less extend the same apply to AIR (BSU-49/B, BSU-50/B) but those limits are match more forbidding (200-700kcas).