I purchased a used SAKO 75 Finnlight 308 and reloaded 150 scirrocos and Berger 155's which display crappy 200 yds groups of 3"- 5" This rifle has a 20-1/4 x 1:11 fluted barrel. Reloading components include Varget, Lapua brass, CCIBR-2, The stock channel is clear but very tight on the sides and difficult to remove. Would you agree this stock needs to be ground out so it isn't so tight? My 300 yd. ladder test was all over the place. Is this typical of the Finnlights ? Thanks for any suggestions !