Ir's completely different and cannot be used in a 17HMR.
At the moment, only Savage, Winchester and Ruger make rifles chambered for it and they are extremely rare in the UK - mainly because the ammo is well nigh impossible to find.
The Savage BMag is the most common and it's generally regarded as a pretty dreadful rifle.
Both the Winchester low wall and the Ruger cost stupid money
In principle it's a very good calibre - a rimfire cartridge with a muzzle velocity of over 3000fps with a 17 grain pill, but the problem is that to get that performance, normal 22 and 17HMR rimfires cannot be chambered for the 17WSM because it generates a much higher pressure.
That means a new action has to be designed and manufactured for the 17WSM and all the European manufacturers have already stated that they will not support the calibre.