OK NoMercy let me see if I got this straight. You're saying that the bore/groove diameter of my 350L and my Ruger Blackhawk 357 mag are the same?
If that's the case than I should have zero issues with my .356" sized Speer Hot Cor bullets. I noticed that with freshly resized brass and after seating the .356" bullets the brass exhibits a slight bulge down to the bottom of the bullet. My seating depth is .020" longer than factory ammo but chambers easily in my Axis.
BTW if you want ever buy a Savage Axis or Edge and want a sweet trigger for about $25 get the MCarbo pro trigger kit. This kit replaces the heavy factory trigger spring and shims for either side of the trigger to prevent the side to side wobble and a stainless steel set screw. Trigger pull went from a 5-6 lb trigger to about 2.5-3 lb. Super sweet and only about a 10 min job.