Uneven lands after chambering with reground reamer

[eww1350]

I am not sure I understand..you (Ipreddick) state that it was ground with no freebore. I understand that to mean that your gunsmith used a separate throater to create freebore or lead to your specifications. If that is true then the error is in the throating process. Which could easily have been miss alignment of the throater..

 

[gunsandgunsmithing]

I am not sure I understand..you (Ipreddick) state that it was ground with no freebore. I understand that to mean that your gunsmith used a separate throater to create freebore or lead to your specifications. If that is true then the error is in the throating process. Which could easily have been miss alignment of the throater..

Maybe, but zero freebore doesn't mean it has no throat.

 

[eww1350]

Maybe, but zero freebore doesn't mean it has no throat.

I agree, but his post states "NO FREEBORE" not zero freebore, there is a difference, I have both....

 

[Shawnba67]

I am not sure I understand..you (Ipreddick) state that it was ground with no freebore. I understand that to mean that your gunsmith used a separate throater to create freebore or lead to your specifications. If that is true then the error is in the throating process. Which could easily have been miss alignment of the throater..

Wouldnt misalignment still cut a cone/freebore shape? I mean the work is spinning so the high point of the cutter would have to cut all around would it not? Unless a person was literally holding it in hand?? (I ask this as a test of my understanding)

 

[TAJ45]

Little to none! Work hardening barrel steel is a myth, IMO. Unless, of course, your tools are dull and you don't have sense enough to know it, or you just plain don't know what you're doing.......... Again, Machining 101 !

Amen^^^

 

[lpreddick]

Good news. My smith set barrel back a little and rechambered using all skills he possesses. Borescope looks perfect...4 land's slopes look the same. Engraved a bullet at .020 into lands and I get 4 equal marks. Shot proven loads yesterday and grouped in the two's! I suspect this was a barrel issue...Not sure what but a lesson learned...If a gun is not shooting and all other variables are optimal, engrave a bullet at max into the lands, then seat it gradually to be sure lands are equally engraving. If you jump bullets and your lands are as these were, imagine the bullet hitting two adjacent lands, then the other two...Thanks for your responses.

The reamer was not the problem. Shot some custom 68 gr bullets today and was very happy.