I'm going to start pouring boolits for my .358 Win and my mold drops a boolit with a .341 shank base. Of the two gas checks listed, which has the best fit to base and a .358" or larger OD after installation? If there is another GC you have used with better results, please let me know. I mainly use Sage GC'c and never used them on anything smaller in diameter than my 10mm. . .and Sage is out of stock!!! Thank you for your input in advance.