There is a problem.
Here in Italy is difficult to have a muzzle brake. There are any on the market. From the USA they now do not send abroad any thing that may be part of a gun ( it happens from 11 september ); with a lot of difficulty I may have some part of may compound and some optics.
In Italy no one knows well how to make a muzzle brake that do not destroy the rifle accuracy.
Sometimes here some gunsmith do a series of holes on the barrel, near the muzzle. But the rifling have many problems and the accuracy is not good.
The best choice for me is to make one to put on my 300 WM
but I do not know the lateral hole diameter, the angle, and the measures of the brake.. and so on
Lorenzo