Sinclair will send small orders (under 12 oz.) by USPS at a reduced shipping rate. If you wish to measure your brass before ordering the bushings, you can do so without paying a big penalty in shipping costs. It may be cheaper than buying a bushing you will never use.Would it be safe for me to go ahead and order one of each, the 0.292 and 0.293, or will it be best to wait and make sure.