Thread: 17 HMR Barrel Length vs Velocity

Was wondering if anyone has any experience with different barrel lengths in 17HMR? I have a CZ 457 Premium (the European style model with the slim forend and comes with iron sights) and I recently took the front sight off as I realised I could see it in the scope... It's left a screw hole at the front, so for aesthetic reasons I thought I might get it shortened. It's also quite long and heavy and so a shorter barrel will be good in many ways. It's currently ~23.5".

The short version is I want to know at what length does the 17hmr hit max velocity? I have only been able to find one graph online that showed it flattening out at around 19-21" and then actually slowing down after that?

(Kind of a separate question but I was also thinking about getting it bedded and properly free floated if anyone has any experience with 'accurising' the 457 and what ACTUALLY makes a difference)