View Single Post
Old February 25, 2019, 06:48 PM   #32
Senior Member
Join Date: April 10, 2008
Location: Alaska
Posts: 6,270
Back to subject:

The simple answer of different size bolt heads for the No.4 was production expediency. Select fit for proper headspace and bolt assembly, then send it down the line.
Science and Facts are True whether you believe it or not
RC20 is offline  
Page generated in 0.03158 seconds with 8 queries