Type 99 bolt closing question.

[vintage hunter]

The Arisaka is a cock-on-open design

You got that bass ackwards Tom, Arisaka's are cock on close. Anytime it requires force to fully close the bolt before it can be rotated it's cock on close. Or if the bolt automatically springs rearward when it's opened without having been fired or de-cocked is another way of looking at it.

you can`t hold the trigger & close the bolt & expect it to de-cock, it won`t happen, no cock-on-open design will !................

Yes they will...... Unless there's something seriously wrong with the 98 Mausers, Mosin Nagants, Carcanos, ect. I own.