gordy gritters chambering and crowning method

C

clinton

Guest
what is you guys opinion of Gordy gritters method of chambering and crowning a barrel, i rented his video from a company called smart flix and re crowned a 10/22 barrel that was shooting poorly. i couldn't really see anything wrong with the crown but i didn't know if it would be visually apparent and under the microscope it looked like they broke the sharp edge with a chamfer tool and it looked really chattery, and being a hammer forged barrel i didn't know how much time they would take to indicate it in. i didn't have a reamer bushing so i ground a small section of rod a tenth at a time until it fit in the bore. drilled and reamed it in the lathe and then ground a piece of brass rod till it fit tightly and then lapped them together with some diamond compound. i got up by the crown under 0.0001 and about 4inches back into at about 0.0003. it may have more than this because i dint know if my setup was perfect. but accuracy substantially increased so i was happy with it. the logic behind his methods seems sound to me, but i have never done this before and don't have anything to compare it to and was just wondering what other peoples opinion was
 
I like Gordy's method too. If you are into rimfire you might research barrel "indexing" and the accuracy benefit from it.
 
Butch's suggestion is excellent.

Do a search on the name Gordy Gritters in this and a couple of other forums and you will find about 3 hours worth of reading on the subject. Do searches on chambering and you will need to pack a lunch and stay over night to read it all.

There has been enough written on chambering on this forum to make a book, complete with pictures. One of the better collections of information and discussion on the subject that exists on the planet.

Fitch
 
The proof of the pudd

as Rumpold of the Bailey might have said is; How does it shoot"?
 
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it puts 5shots into one ragged hole at like 35 yards, where as before it was shooting a 3-4 inch group. was kinda nervous cutting into a really nice 10/22 barrel but it was shooting like crap, I'm confidant in my machining but i still hate the kinda jobs where it has to be perfect and you only have one shot at it.
 
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