I'm getting ready to swap barrels on both my Savage PTA and my Savage model 12. A 6XC is going back on the model 12 and my 6SLR is going back on the PTA. Before making the switch I decided to check CBTO to lands on both barrels with the two bullets they will shoot. The bullets are; 105 Hornady AMax, 105 Berger Hybrid - both hBN coated.
Using the Stoney Point (now Hornady) tool, I measured each bullet 4 times in each barrel. The measurements only varied by .0015" so I felt very comfortable with my measurements.
Here are the results.
6XC Amax 2.231" Hybrid 2.228" difference of .003"
6SLR Amax 2.275" Hybrid 2.236" difference of .039"
Using the same two bullets in the two barrels, I expected the differences to be nearly the same. So I am really baffled. The only two things that I can think of that could cause the differences. 1. The 6SLR is a 5R Bartlein and the 6XC is a Criterion, button rifled. 2. I believe the Bartlein has a .237" land diameter, and maybe the Criterion has a .236" land diameter.
Any ideas? Thoughts? Theories?
Using the Stoney Point (now Hornady) tool, I measured each bullet 4 times in each barrel. The measurements only varied by .0015" so I felt very comfortable with my measurements.
Here are the results.
6XC Amax 2.231" Hybrid 2.228" difference of .003"
6SLR Amax 2.275" Hybrid 2.236" difference of .039"
Using the same two bullets in the two barrels, I expected the differences to be nearly the same. So I am really baffled. The only two things that I can think of that could cause the differences. 1. The 6SLR is a 5R Bartlein and the 6XC is a Criterion, button rifled. 2. I believe the Bartlein has a .237" land diameter, and maybe the Criterion has a .236" land diameter.
Any ideas? Thoughts? Theories?
