{"product_id":"mec-325cp-primer-seating-assembly-for-600-jr-sizemaster-steelmaster-reloaders","title":"MEC 325CP Primer Seating Assembly - For 600 Jr., Sizemaster, Steelmaster Reloaders","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eMEC 325CP Primer Seating Assembly\u003c\/span\u003e\u003c\/strong\u003e is a genuine \u003cstrong\u003eMEC (Mayville Engineering)\u003c\/strong\u003e replacement \u003cstrong\u003e3-piece priming station\u003c\/strong\u003e kit for single-stage shotshell reloaders. It contains the primer seating pad, primer seating cup, and primer seating spring - the three components that make up the complete primer seating function on a MEC single-stage press.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eDesigned as a \u003cstrong\u003edirect factory replacement part\u003c\/strong\u003e, the 325CP fits the \u003cstrong\u003eMEC 600 Jr.\u003c\/strong\u003e, \u003cstrong\u003e600 Jr. Mark V\u003c\/strong\u003e, \u003cstrong\u003eSizemaster\u003c\/strong\u003e, and \u003cstrong\u003eSteelmaster\u003c\/strong\u003e single-stage shotshell reloaders in all gauges. It seats primers cleanly across all standard grains, restoring reliable primer seating on a press that has worn out its original priming components. Whether you are rebuilding an older MEC single-stage or just keeping a spare on the bench, this is the correct OEM assembly.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cstrong\u003eKit includes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003ePrimer Seating Cup (part #326)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003ePrimer Seating Spring (part #330)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003ePrimer Seating Pad\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MEC","offers":[{"title":"Default Title","offer_id":55292299379010,"sku":"325CP","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/alt_f8a649fc-7beb-4049-8460-2b1e50b6ae72.jpg?v=1785102796","url":"https:\/\/centerfiresystems.com\/products\/mec-325cp-primer-seating-assembly-for-600-jr-sizemaster-steelmaster-reloaders","provider":"Centerfire Systems","version":"1.0","type":"link"}