Hornady Go/no-go, Horn 6687 Go/no Go Muzzleloader Gauge Battery Isolators and you never need to

and you never need to replace the batteries

1" diameter tubing

Wire Range:22-18

Designed for recreational boaters and professional mariners

Hornady Go/no-go, Horn 6687 Go/no Go Muzzleloader Gauge Battery Isolators and you never need toThe go gauge should pass through the bore to the breech plug. Do not force it. If it will not fit, the bore is probably too tight for easy loading. The no go gauge should not fit in the bore at all. If it can be inserted into the bore of the muzzleloader, the bore is probably too loose for optimal accuracy. However, you may find that the sabot will still give satisfactory performance. Type: Go No Go Gauge Caliber: 50 Cal Size: . 500" . 502" Quantity: 1