Original brake is indeed very good. It does make shooting next to it a tad difficult, but for the shooter it works well. Heh, one time I managed to shoot in the back of a van with it, rear doors open and myself on my belly in the back, something like IRA style. The owner of the van said he thought the windows would be flying off, I felt like punched in the nose. Magnificent.
Otherwise, when using the Ase Utra suppressor for it, SL7
S Series SL7 sound suppressor | Ase Utra, it is entirely possible to go without any hearing protection, from my experience. True, the plugs do help, but the the rifle is not very loud. It is a good Thump, but nothing sharp.
And lastly, older TRG 42 folding stock was a bit on the flimsy side for the 338 LM caliber, the folding mechanism wore out faster and started to rattle a bit, at least in here at this part of the world, but the factory made some improvements and new ones should be good to go. The grip on the fixed stock seemed to be too wide (or the circumference was too big) for me, I would prefer a bit slimmer one (somehow the folding stock's one seemed to fit perfectly). But it is a good solid piece of weaponry, something that the Finns seem to be able to do extremely well, does what is asked and hits where aimed. Depending on the shooter, of course.
I have to look at the target pics, but I've seen that rifle do about 0,4 MOA at 903 meters, and headshots (on cellulose-made soldier, of course) at 920-30 m.