Sinclair International
Sinclair Shoulder Bump Gage Insert #21 220 Swift
Sinclair Shoulder Bump Gage Insert #21 220 Swift
This Sinclair Shoulder Bump Gage Insert #21 is a precision-machined reloading component built to measure a 21-degree shoulder angle. It is made specifically for 220 Swift cartridge cases, so it fits that caliber directly when you check shoulder bump.
Used during case preparation and sizing, the insert lets you read shoulder bump accurately so you can set proper cartridge headspace and keep your ammunition consistent from round to round.
Key Features
| Brand | Sinclair International |
| Product Type | Shoulder Bump Gage Insert |
| Caliber | 220 Swift |
| Shoulder Angle | 21 Degree |
| Model Number | #21 |
| Manufacturer SKU | 749011471 |
| UPC | 050806111189 |
| Condition | New |
How to use
Install the insert in a Sinclair Shoulder Bump Gage, then measure the shoulder position on 220 Swift cases during case preparation and sizing to set proper cartridge headspace.
Frequently asked questions
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