Bartlein: 7mm Blank, Stainless Steel, 27" #3B

7mm bbl, .277x.284

5 Groove

1-8 twist

#3B

Stainless Steel

• 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