Lee Auto Prime Shell Holder #21, 6.8mm Remington SPC

The Lee Precision Auto Prime Shell Holder #21 (Lee part no. 90031) is the correctly sized fitting for reloaders who prime brass by hand instead of on a press. It’s built for 6.8mm Remington SPC cases, snapping onto the case head so it stays square and centered through every stroke of the hand tool. Serious handloaders keep a full run of these numbered shell holders on the bench because hand-priming gives far better feel for seating depth than a press-mounted system. Pick up the correct number for your cartridge from our reloading equipment lineup and prime with confidence.

Key Specifications

• Ships at a listed weight of about 0.5 oz, light enough to stock a full run of sizes without adding real shipping cost.
• Sold individually (qty. 1), so you can fill in exactly the sizes missing from your bench.
• Holds one case at a time, giving you full feel and control over primer seating depth on every stroke.
• Sized for 6.8mm Remington SPC brass, seating the case securely with no wobble during priming.
• Marked as Lee’s size #21 Auto Prime shell holder, keyed to this specific case-head diameter.
• Snaps around the case head to hold it square and steady through the full hand-priming stroke.
• Built exclusively for the Lee Auto Prime hand press; it will not mount on a reloading-press shell plate.
• One of 20 individually numbered Auto Prime shell holder sizes Lee produces, each matched to a specific case-head diameter.
• Also sold in an 11-piece kit covering more than 115 cartridges, for reloaders who prime multiple calibers by hand.
• Classified by Lee under its Priming Tool style line, built for one job: seating primers by hand.

Frequently Asked Questions

Will this shell holder fit my reloading press? No. Lee’s Auto Prime shell holders are built only for the Lee Auto Prime hand-priming tool, not for a press shell plate.

How many Auto Prime shell holder sizes does Lee make? Twenty individually numbered sizes, sold separately or in an 11-piece kit that covers more than 115 cartridges.

What cartridges does the #21 shell holder fit? It’s sized for 6.8mm Remington SPC.

Buy the Lee Auto Prime Shell Holder #21, 6.8mm Remington SPC

Order it from our Lubbock, Texas gun shop for fast, reliable shipping. Every numbered size in the Auto Prime lineup is available from our reloading equipment shelf, so you can pick up the exact match for your cartridge.