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Posted: 6/9/2009 12:32:33 AM EDT
I've heard of some kind of acidic chemical that dissolves lead into a liquid and can be used in sealed .22lr cans to get rid of the fouling, but only if the can is made of stainless steel.

Could you do this with a stainless 5.56 can shooting .22lr every 1000 rounds or so and not ruin the can? Will the chemical harm inconel? Will I ruin a $1000 suppressor?
Link Posted: 6/9/2009 4:00:43 AM EDT
[#1]
A 50/50 mix of hydrogen peroxide & white vinegar (paracetic acid) is what's used. And no, it won't harm Inconel.



Link Posted: 6/9/2009 6:23:14 AM EDT
[#2]
Link Posted: 6/9/2009 3:21:33 PM EDT
[#3]
I appreciate the responses. The reason I asked is because I don't have a dedicated .22 upper, just the conversion kit. I'd like to practice with that conversion kit on my go-to rifle everyone once in a while and I plan on buying an AAC SPR/M4 when I come back to the states. It would be just as easy to take the suppressor off and shoot the .22.

I might email AAC and see what they think about it.
Link Posted: 6/9/2009 3:38:57 PM EDT
[#4]
Quoted:
A 50/50 mix of hydrogen peroxide & white vinegar (paracetic acid) is what's used. And no, it won't harm Inconel.



This creates lead acetate. Wear appropriate chemical resistant gloves, latex will NOT protect you. It is a very dangerous compound.
Link Posted: 6/9/2009 4:23:17 PM EDT
[#5]
Link Posted: 6/9/2009 4:52:52 PM EDT
[#6]
Mercury.
Link Posted: 6/9/2009 5:43:24 PM EDT
[#7]
Quoted:
Quoted:
I appreciate the responses. The reason I asked is because I don't have a dedicated .22 upper, just the conversion kit. I'd like to practice with that conversion kit on my go-to rifle everyone once in a while and I plan on buying an AAC SPR/M4 when I come back to the states. It would be just as easy to take the suppressor off and shoot the .22.

I might email AAC and see what they think about it.


Ah.  This could bring you other headaches.  If you are shooting a 1:9 or faster twist (as are common for current production ARs), then you may have stabilization issues.  For typical 40-grain ammo you really want a 1:16 twist.  Also, there is a slight difference in bore diameter.

I strongly recommend a dedicated .22 upper if using a silencer.



This doesn't hurt anything.  It overstabilizes the bullet, but this is only an issue if shooting light bullets at high speed that may come apart.(ie 32 grain at 4000 fps).  A 40 or 36 grain lead bullet at 12-1400 fps isn't going to hurt anything in a 1/9 twist barrel.

-dan
Link Posted: 6/9/2009 8:38:54 PM EDT
[#8]
Quoted:
Quoted:
Quoted:
I appreciate the responses. The reason I asked is because I don't have a dedicated .22 upper, just the conversion kit. I'd like to practice with that conversion kit on my go-to rifle everyone once in a while and I plan on buying an AAC SPR/M4 when I come back to the states. It would be just as easy to take the suppressor off and shoot the .22.

I might email AAC and see what they think about it.


Ah.  This could bring you other headaches.  If you are shooting a 1:9 or faster twist (as are common for current production ARs), then you may have stabilization issues.  For typical 40-grain ammo you really want a 1:16 twist.  Also, there is a slight difference in bore diameter.

I strongly recommend a dedicated .22 upper if using a silencer.



This doesn't hurt anything.  It overstabilizes the bullet, but this is only an issue if shooting light bullets at high speed that may come apart.(ie 32 grain at 4000 fps).  A 40 or 36 grain lead bullet at 12-1400 fps isn't going to hurt anything in a 1/9 twist barrel.

-dan


I believe Bookhound is refering to the greater chances of baffle strikes with out a dedicated upper. Even at only 1200 fps. an unstable/overstable .22 bullet could cause a lot of damage to a baffle.

Link Posted: 6/10/2009 4:09:55 PM EDT
[#9]
Link Posted: 6/12/2009 5:34:21 AM EDT
[#10]
Link Posted: 6/12/2009 6:10:08 AM EDT
[#11]
Link Posted: 6/12/2009 6:45:13 AM EDT
[#12]
Doesn't "Ed's Red" dissolve lead deposits to some degree?

Years ago, I bought an unused paint can, and filled it with Ed's Red.  Once a year, or so, I'd take the plastics off of my Ruger Mark II, drop it in the can, seal it up, and forget about it until I was ready to shoot again.  Boy, did it always come out sparkly clean.  I don't know much about silencers, but something like that might work...

Come to think of it... I haven't shot that pistol in five years.  It's probably still down in the garage in that can.  I should go look.
Link Posted: 6/12/2009 6:57:07 AM EDT
[#13]
Quoted:
Doesn't "Ed's Red" dissolve lead deposits to some degree?

Years ago, I bought an unused paint can, and filled it with Ed's Red.  Once a year, or so, I'd take the plastics off of my Ruger Mark II, drop it in the can, seal it up, and forget about it until I was ready to shoot again.  Boy, did it always come out sparkly clean.  I don't know much about silencers, but something like that might work...

Come to think of it... I haven't shot that pistol in five years.  It's probably still down in the garage in that can.  I should go look.


Link Posted: 6/12/2009 7:30:22 AM EDT
[#14]
Quoted:
Quoted:
Doesn't "Ed's Red" dissolve lead deposits to some degree?

Years ago, I bought an unused paint can, and filled it with Ed's Red.  Once a year, or so, I'd take the plastics off of my Ruger Mark II, drop it in the can, seal it up, and forget about it until I was ready to shoot again.  Boy, did it always come out sparkly clean.  I don't know much about silencers, but something like that might work...

Come to think of it... I haven't shot that pistol in five years.  It's probably still down in the garage in that can.  I should go look.




I just checked, and it's not in the can.  I looked in the case, and there it is, assembled, shiny, and clean.  
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