It does not matter, if you are happy with your edges and your maintenance schedule, but it is not normal, a razor that is properly maintained should hold an edge longer than 10 shaves. That it is happening with different razors eliminates the razors as the issue.

The problem with learning to maintain a razor is that proper stropping takes some time to learn. One miss-stroke can damage or completely wipe an edge, then many laps on linen/ leather or a pasted strop may revive it, if not then yes it will have to go back to the stones. The grit is determined by the damage.

Proper stropping on linen and leather can keep a properly honed razor shaving for months, a pasted strop… indefinitely.

How the razor was honed, the type and grit of stone and the honer’s experience, amount of pressure and number of laps, can affect the durability of the edge.

For example using a 1k Diamond plate or a low grit (sub 1K) hone with excessive pressure may cause a crumbling edge down the road. It may shave well for a while, but then the edge begins to crumble with microchips.

This often is caused by the deep stria caused by the aggressive honing during bevel setting.

So no it is not normal.

If stropping is an issue for you… learn to strop, find a mentor, have someone watch and coach you. Slow down, keep the spine on the strop at all times, stop then flip. Also use a good quality strop.