Who wants you hold their 10-22 bolt closed longer?

[Gordo]

Noticed long ago that with even very low power .22 RF rounds, like CB Longs that the 10-22 bolt cycles way too soon.
Some people mask it with using soft buffer (rear most pin) to dampen the bolt.
I've always thought that a heavier bolt, or spring would slow the bolt more.
So I first set out to install a Wolff heavy spring, but it didn't slow it enough for my liking.
So, besides making a bolt out of tungsten, or machining the stock bolt to take tungsten inserts, I decided to go a different direction.

Detent bolt locks, kind of a variation on roller locks.

Let the drunk hate begin...

 

[V-Tach]

I drilled the bolt and installed tungsten plugs to give the bolt more weight when firing from an open bolt............

A closed bolt is very slow to cycle compared to an open bolt 10/22........

Disclaimer It was a legal Post Dealer Sample........

I know ............apples to oranges, but interesting none the less........................

I appreciate your innovation............

 

[Lead Belly]

That looks pretty clever. Appears as if it will put a bit of upward pressure on the bolt, as well.

Would love to see a slow-mo comparison of the modification to see how long a delay you get, as well as chrono difference.

 

[Nicholst55]

Will it eventually wear two grooves into the aluminum receiver?
Will it matter?

 

[Gordo]

The detents are from McMaster-Carr.
Detents
They exert 2 lbs force at full extension, 5 lbs at full compression (each).
Total travel is only .035", and they only engauge the bolt the last 1/8".
The next time I have it down, will measure what force it takes to pull the bolt back from battery, but it is noticeable when charging the rifle.

I keep forgetting that my phone will take super slow motion vids.
Used that feature many times when actually working, to show the dumb-ass engineers why their machinery wasn't working.
Will drag someone along to the range the next time I have it out.

Haven't seen any wear on the receiver as of yet, but I lube that area with grease, and like I said at the start of this post, the bolt is only on them for the first 1/8" of travel.
But you are correct, it would effect lockup if the receiver would wear much at all.
If I detect any, I will coat that area with either KG Gun Kote, or the same moly coating I use on pistons.

 

[David C]

That’s a pretty nifty idea. How many rounds have you put through it after the detents?

 

[Gordo]

About a hundred rounds.

 

[PinnedandRecessed]

I see the utility of changing bolt speed with a full auto but what's the benefit in a semi 10/22?

Asking for real.

 

[orbitup]

I see the utility of changing bolt speed with a full auto but what's the benefit in a semi 10/22?

Asking for real.

Quieter if suppressed I imagine. Mine is stupid quiet as is though.

 

[PinnedandRecessed]

Mine is stupid quiet as is though.

same same.

To each their own but sometimes the juice ain't worth the squeeze.

 

[Gordo]

Loved it when other racers think that way.
What ever my son & I race, we dig, and claw for every .01 of a second we can find.
But at the end of the day, We always qualified front row, and left people with way more money than us claiming we were cheating.
The juice is always worth the squeeze.

Oh, and it isn't just sound...

 

[PinnedandRecessed]

Loved it when other racers think that way.
What ever my son & I race, we dig, and claw for every .01 of a second we can find.
But at the end of the day, We always qualified front row, and left people with way more money than us claiming we were cheating.
The juice is always worth the squeeze.

Oh, and it isn't just sound...