That is a classic example of one dimensional thinking Phib...
There are many practical uses for a Detachable magazine in a Bolt action rifle, not just speed.
I have and use all the different types of systems in my bolt action rifles.
I think the ultimate Magazine System is the Browning Swing down system that they have used on their Bolt Actions since the BBR... and now on the A-bolts.
The Magazine can be loaded in FOUR WAYS: through the ejection port just like closed well and hinged floor plate rifles.
Or with the magazine box swung down but still attached to the hinged floorplate, or with it completely detached from the floorplate.
You can also just unsnap an empty Mag and replace it with a full one while the bolt is closed on a live round!