I bought a Ruger 10-22 Deluxe Sporter 23 years ago. If I remember correctly it was $129.00
It was the most inaccurate rifle i have owned. I tried a variety of ammo and the results were
the same 3" at 50 yards on a good day. It spent the next decade or so at the back of the gun safe.
About 10 years ago I rediscovered it and thought I should do something with it.
I replaced the factory barrel with a Green Mountain Barrel. I modified the trigger and sear to get the
trigger pull down to around 3 pounds and head-spaced the bolt from .055" t0 .043". What an improvement.
The new barrel was fussy about ammo but worked well with the right ammo.
But I never liked the look of the flutes or longer 22" barrel and I missed the sights.
The original barrel sat on my tool box in the man cave for several years. One day I took
the barrel and machined a slug that would fit in the chamber so I could measure where the rifling started.
According to Sammi specs the bullet was .060" away from the rifling when chambered. I chucked the barrel
in my lathe and I removed .090" from the breach face and the face the contacts the receiver.
The bullets now will engage the rifling by .030" when chambered.
I re-cut the extractor groove in the barrel with a slitting saw and touched it up with a file.
I removed the Green Mountain Barrel and reinstalled the factory barrel and made a trip to the range.
I still can't believe the difference.
The factory barrel now consistently shoots under 3/4" of an inch at 50 yards with bulk ammo.
I stripped the stock and refinished it with tung oil and made up a longer magazine release for it and
modified the bolt release so it releases when the charging handle is pulled back.
It contains no aftermarket parts and it functions flawlessly and has a much better trigger.
I have let quite a few people shoot it and they all were really impressed.
Some of them even said to let them know if I ever want to sell it.
Terry