Zeneffect Wrote:I should also mention "ruff and tumble" is not the way my ammo sees the chamber. Very often I'm beyond mag length so I have a Bob sled in and single feed everything now. The round doesn't have much forward movement to push the bullets forward with inertia. I haven't actually tried from a magazine, but I know the rounds i have loaded fit and can measure to see if there is any growth... will run the same one in and out 20x and see if if there is any difference before + after. I think there will be
Zene,
Maybe, If the bullet weight exceeds the static friction then they will creep forward. But as long as that is the same every round then it's probably a non-issue.
I found in Blackout with super heavy 220gn bullets they creep forward in the carrier-slam more and more as the inside neck surface area holding them in place gets less. But if you were to use a fresh round each time then the surface area and the tension holding them in place will be the same.
Edit to this post...When you think about it the surface area of the long heavy bullet was not less as it crept forward with each subsequent slam feed, it is the same. Maybe it was moving forward more each time because of the grip loosening, or the interface becoming smoother with each rub.