My Winchester m70 in 7mm wsm is throated short and is leaving .185" free in the magazine and forcing the 168gr berger classic hunters much farther into the case than is ideal. I'm thinking of ordering a 7mm throat reamer from ptg with a t handle and lengthening the throat. The rifle shoots pretty darn good as it sits and it would be a shame to wreck that but the seating depth is bugging me. Has anyone here done this and how did it work out. I'm probably going to do it anyway but wanted others experiences and any heads up they can give. Worst thing that could happen is I have the 3 groove 9 twist in the corner installed when I wreck the factory barrel. Anybody want to share their experience and the finer points to look for ?