Bartlein: .30 Cal, Blank Stainless Steel - 29" - #23 Marksman Contour

.30 Cal bbl, .299x.308

5 Groove

1-10 twist

Stainless Steel

#23 marksman contour

Breach Diameter: 1.350"

• Bore Diameter tolerance = +.0005
• Groove Diameter tolerance = +.0005
• Bore and Groove uniformity along entire length of barrel +.0001/-.0000
• Twist uniformity is best in the industry. Twist can be carried out to the 4th decimal point. Example: 11.3642 A Bartlein