I have converted quite a few Kynoch 8mm Lebel to 209 primed 10.35 Italian Vetterli, but i ran out of those cases. The military Lebel cases I have has a groove in the base to catch the point in the tube feed rifles and is making a 209 conversion problematic. I considered the usual conversion to LR boxer primers, but the pocket is a bit to wide and shallow. However, the inside of the berdan primer is about the size of a boxer small rifle primer with enough room to swage it to proper width. The depth is also the same between the two if I remove the berdan anvil. Any problems with considering this idea?