Form 1 Carbine silencer

[jim c 351]

Form 1 carbine silencer.

[Dave Waits]

Nice suppressor, who made it?

[jim c 351]

I made it. Thanks for the compliment.
Jim C

[kurtflys]

does a class three form need to be sent? How quiet is it? Looks cool=)

[jim c 351]

does a class three form need to be sent? How quiet is it? Looks cool=)

You have to file a ATF form 1 and pay a $200.00 tax before you start work.
With factory full power ammo its a little louder than a 22lr out of a Ruger 10/22.

With a reload -110 gr FMJ & 7gr Unique , it sounds the same as a Ruger 10/22.
With a reload -110 gr Rainier plated & 4 gr Unique it sounds like a pellet gun , but hand operation is required.
Jim C

[tsmysak1]

I have been trying to find a subsonic load that operates the action. I did manage to find a detailed write up on this issue.

Instead of reducing the powder charge to nothing to drop the velocity, the idea is to use extremely slow burning powder, which normally would drop the velocity way off, but would have much higher pressures in the barrel before bullet exit. This will operate the slide. Tune and go.

I was trying this on the 223. Commercial rounds available are very heavy blunt bullets loaded with powders like 7828, 4381, or H1000. A bullet with a long bearing surface helps up the pressure (which is typically 10,000 psi). Since 100 grain 22cal bullets are way expensive, I am trying this first with 68 grainers and a little luck.

Always check the stability first before firing through the can... Baffle strikes are bad...

The carbine case is more limited. It may be possible with like 4064 or something slower...

[jim c 351]

I have been trying to find a subsonic load that operates the action. I did manage to find a detailed write up on this issue.

Instead of reducing the powder charge to nothing to drop the velocity, the idea is to use extremely slow burning powder, which normally would drop the velocity way off, but would have much higher pressures in the barrel before bullet exit. This will operate the slide. Tune and go.

I was trying this on the 223. Commercial rounds available are very heavy blunt bullets loaded with powders like 7828, 4381, or H1000. A bullet with a long bearing surface helps up the pressure (which is typically 10,000 psi). Since 100 grain 22cal bullets are way expensive, I am trying this first with 68 grainers and a little luck.

Always check the stability first before firing through the can... Baffle strikes are bad...

The carbine case is more limited. It may be possible with like 4064 or something slower...

tsmysak1,
As far as the 223 is concerned, I see no really good reason to hunt for a subsonic load. It already exists and is called a 22LR. I realize a 68 gr bullet at 1050 would have more energy than a 40 gr bullet at 1050, but not enough to impress me. So-- as far as I'm concerned, you should either live with the crack or install your 22LR conversion unit.
Now back to the carbine. I tried 2 loads to attempt to squeeze more power, keep the vel at 1050 and cycle the action, but I failed.
Load #1 was 150 gr Berry plated and 4 gr unique.--Avg vel was 922.9 --empty stayed in barrel.--slight keyholing.
Load #2 ---150 gr Berry plated and 5.5 gr unique.--Avg vel was 1180 fps.--ejected empty,-- did not feed next round. Keyholed worse than load #1.
Even if load #2 didn't keyhole it was still super sonic without cycling the action.
At this point I gave up and settled on the loads mentioned in my previous post. I think the 1-20 carbine twist is the culpret.
Thanks for commenting.
Jim C