That's been the crux of the 17HMR semiauto issue since the beginning, which is why all of them have been pulled off of the market.

If the action is light enough to cycle with such a low weight bullet and small gas expansion ratio, then it's too light to keep the action closed long enough to depressure to a safe limit, so your 10/17 Mag blows the magazine out the bottom when it opens. If it's heavy enough to keep the bolt in battery throughout the peak pressure, then it's too heavy to let the action fully cycle due to the light bullets.

Savage's new design for the A17 promises to fix that issue.

The A17, unlike the 10/17, is not a straight blowback action. The A17 has an interrupted blowback design with a camming locking bolt, such that it sustains positive lock up when chamber pressure is still high, then has a light enough bolt and spring to allow the tiny 17cal bullets to fully cycle the action. In essence, the A17 lets your have your cake and eat it too.

If/when they put a heavy barrel on top, and a laminate stock on bottom, I'll be adding one to my rimfire arsenal - and another one after that if they ever figure out how to make that apply to the 17WSM!