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If you haven't reloaded and are close enough to Arlington (40 miles north of Seattle) you can stop over and load some 10mm. I have a 10mm and load for it. I just ordered some more once fired 10mm brass. If you are looking for used equipmrnt I know three guys who sell used reloading stuff. I cam PM you thier contact info.
10 mm is a bit more challenging with the math because not all of the bullet companies will make those simply because there is nowhere near the demand as for 9 mm, 40, 45 or even 357. That said, reloading is nearly always cheaper except for stuff like 22 lr.Your first step will be finding affordable bullets as the powder and primers are universal and won't be an issue. For 9 mm, I use Montana Gold, but they don't make 10 mm bullets.I can't offer any advice as I have never bought 10mm bullets, but that is where you should focus your efforts on making the decision whether to load or buy.