Are the thread pitches on the barrels the same on the Marlin XL-7 and Savage 110's??
The Savage 110 = 1.055" at 20 TPI
Savage 10 (WSM) = 1.120" at 20 TPI

What is the Marlin XL-7??
Are the barrels interchangable??

Is Boyd's making a thumbhole for XL7 yet??