"Herman,
The breechplug on the Pro Hunter is 1.75". The bbl length (end to end) is 28".

[>:]ACTUALLY,,[>:] THEWHOLE BREACH PLUG MEASURES OUT TO BE EXACTLY 2 1/8 INCHES TOTAL LENTH END TO END, AND THE BARRELL IS 28 3/16TH INCHES IN TOTAL LENTH END TO END NOT COUNTING THE HAMMER JUST THE WHOLE BARREL,