My best pump has been a Bontrager small floor pump with a clamp on head. Now discontinued. WTF. Way better than a screw on one.
What does happen is the screw on cap comes LOOSE. Simple fix. That's why it won't then do high pressure and takes longer.
Inside there's just an O ring with no lube.
Holding those other hand held pumps flailing in the air 150 strokes is NUTS.