Hornady 366 Auto Powder Charge Bushing #507
S117774
- Powder charge bushing for the Hornady 366 Auto and APEX shotshell reloading presses
- Inside diameter of .507 inches — Hornady bushing numbers denote bore size, not grain weight
- Actual powder charge depends on the powder used; consult the Hornady 366 Auto bushing chart
- Interchangeable design lets you switch bushings to fine-tune loads in half-grain increments
- Charges are averages after a full reloading cycle and may vary with technique and powder variables
- Use only with the 366 Auto or APEX chart — separate charts apply to other Hornady loader models
- Hornady item #190236
The Hornady Powder Charge Bushing #507 is a replacement and fine-tuning bushing for the Hornady 366 Auto and APEX shotshell reloading presses. Hornady identifies its powder bushings by inside diameter: the #507 has an inside diameter of .507 inches, which governs how much powder drops with each cycle of the press. The number refers solely to the bore dimension, not a grain weight — the actual charge delivered depends on the powder you are using and should always be determined from Hornady's published bushing chart for the 366 Auto. All charges on that chart are averages taken after a complete reloading cycle, and real-world drops may vary slightly with operator technique and powder lot. Because powder agitation during loading affects charge weight differently across loader designs, Hornady publishes separate charts for each press model; the 366 Auto chart must be used for this bushing. Bushings are interchangeable, letting shooters dial in half-grain charge increments when switching powders or working up a new load. Hornady item #190236.
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