does or can anyone recomend a gunsmith to re-do my sako TRGS in 338 lapua?

Re-do what part?

I think any competant Smith can diagnos and rechamber if needed. Where are you from? Check people in your area, ask around the range etc.

Dempsey,
My guess, if we can diverge a bit, is that he is from Poulsbo Washington. A City that is most famous for their incredible multigrain bread, 49 different grains or 1,356 or something, it is good. Your trivia for the day.

I fI remeber correctly, you were having to knock the shells out with a cleaning rod. A few things can cause this, but the most common is to have a too tight neck cut in the chamber. If possible, neck turn a handful of cases and load and shoot them. If it is ok, then either neck turn all cases or have some one recut the chamber neck. Some one can do a chamber cast and measure the neck and see what it is. THis may or may not be easier for you than neck turning some cases