Using a 15/64" Drill bit to drill a chamber for 10/22

t_102 has responded three times to some excellent information.

He has been told.

His replies indicate he really wants to carry through with his original idea.

Should his plan be carried out and he refuses to listen to reason . . . then I can hear "I TOLD YOU SO" resonating from Sea to Sea to Sea!
 
horseman2 said:
t_102 has responded three times to some excellent information.

He has been told.

His replies indicate he really wants to carry through with his original idea.

Should his plan be carried out and he refuses to listen to reason . . . then I can hear "I TOLD YOU SO" resonating from Sea to Sea to Sea!
Click to expand...

Horseman2, you are quite judgemental. Thats all I'm going to say.
 
I can't believe you are even considering trying to use a drill bit to make the chamber bigger. I understand there are redneck ways of trying to do something, but this is just plain stupid and dangerous. I wouldn't want to be anywhere near that gun when you try and fire it. Take everyone's advice and get it professionally reamed or get warranty work done on it.
 
i cant wait to see the finished product. please take pics as you " drill" the chamber to make it " just a bit bigger" my guess is it will be scrap after you are done. just my 2 cents worth but why anyone would atempt this is beyond me. get or borrow a reamer. the "drilled"chamber is most likely to rupture cases and put your eyesight in danger.like i said, just my 2 cents worth. please take pics
 
Let us know how it works.
If you succeed, all is good.
If not we get a new topic to amuse ourselves with. Blaxsun may even add this to his crazy thread-topic schedule.
Win-win situation!
 
At least 28" is long enough that when the breech is ruined, it can be cut off, refitted and rechambered.
 
^^^^^^^^^^
yes, but with the condition that his actual barrel does not have a taper
that starts right in front of the v-block groove.
If it has that kind of taper, to re-chamber and retain the .920 diameter required
for fitting into the receiver, then it will need sleeving and all kind of other enemas.
 
You are aware that the hole a 15/64 bit will make is going to be bigger then 15/64 and will way over sized. Drill a hole in a soft piece of steel and insert a 22 shell and see what happens. Will rattle around like peas in a gourd. That and how pray tell are you planning to keep the bit straight when you drill.
A better idea would be to put fine lapping compound on a empty shell and lap the chamber a bit instead.
 
C'mon guys!

I'm waiting to see if he's as stupid as he is stubborn.

Sounds like!

:popCorn:

I REALLY want to see pictures if he does this.

It won't be all bad! Someone will get to sell him a new special barrel AND a reamer!

Cheers
Trev
 
*Flame suit on*

I ended up using a #1 drill bit, which has a diameter of 0.228", the bit seems to almost slide in. I put some oil on the bit, covered the bit with tissue paper for grip, then started spinning it in with my bare grip. The previous gunsmith had it drill to a depth of 0.75", but I needed 0.7751" accoring to "sporting chamber" dimensions. After I was done, I shined a bit of light into the breach and indeed there was quite a few marks left by drilling. (I shall use a dremel to polish this later tomorrow)

After "messing around" with the barrel, I put a live round into the chamber and it seems to me that the chamber was indeed slightly oversized, just ever so slightly that you can barely hear it rattle if you shake the barrel, but it was there. The gap was obviously wide enough to allow the live round to be freely slipped in and out. I would guess that the gap is probably about ~0.1mm wide.

Next, I was ballsy enough that I put it together, went out to the field and put about 9 rounds through her just to see if the case would stick or rupture in the chamber. So far so good(I admit 9-10 rounds is nothing and I should try at least 500-1000 rounds just to prove that it does improve over the previous diameter)

Nonetheless, I was too impatient as the gunsmiths I've been to all say they don't have the proper "loose tolerance" style reamer, only the match kinds that are wayyy too tight.

I will report back again with pictures and video when I visit the range this weekend.

Disclaimer: Do at your own risk, you "might" damage the chamber! ;)
 
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Rifleman44 said:
You got balls, i'll give you that.
Do you seriously believe you held the .7751" dimension twisting the bit by hand?
Click to expand...

Absolutely not, I drilled it further than that. The main reason for getting further than 0.7751" was because before modification, the rifling is too tight and starts just a tad too early that the bullet would get stuck. A live round could not be ejected, dangerous situation.

In all, I drilled it further than 0.7751" just to ensure the bullet doesnt get engaged by the rifling. I'm all for reliabilty, not really the accuracy.

Although I do question if and how much accuracy suffered. Nonetheless, its a little 22 built to shoot very quitely, so kids and the wife doesnt get too scared of the sound.
 
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