Mosin M-38 Bore Issue

Drachenblut

Drachenblut

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Hello all,

Ok. Firstly, I unsuccessfully slugged my bore some weeks ago, and had a hell of a time getting the lead out... or so I had thought. Basically, the rifle is counterbored and when I tried to push the lead piece I was using down past the "inner rim" of the rifling from the muzzel end, it sheared a bunch of lead off. I ended up cleaning this out... well I took the rifle out and looked down the bore, and right at the end of the bore, it seems the diameter is smaller... on close inspection of the muzzel "inner lip/tip" there is a buildup of lead in a rin around the exit of the rifled section of the bore, and when you look down the bore from the muzzle, there is a visible "ring" almost like the lead has tightened the diameter very slightly around the end of the rifling. I went in with my cleaning rod, and 50 patches later using hoppes No.9 and outers gun oil there is little change, one side of the ring is gone, but the other side is still there. If I fire the rifle, will it push the lead out? Is this safe to shoot? What are the dangers if any here? Would this not be like lead deposited in the bore by shooting exposed lead rounds?
Advice needed asap please!
Yours,
Drachenblut
 
Next time you slug a bore think of the barrel as a one way street, the bullet moves from the breech to the muzzle. Load your lead sinkers or balls at the same end you put your cartridges.

Many people “shoot” the lead out of their barrels but there is a difference between “leading” and a lead road block.

Read the 4th posting below carefully…………..you want to remove lead so use a lead cleaner and not a copper cleaner.

http://castboolits.gunloads.com/showthread.php?t=67984
 
Bigedp51, thanks for the info. It is much appreciated. i will have to use the Painthinner method as it's all I will have availiable... I can't believe all this time I have been scrubbing away at my bore, seeing it sparkle and yet, when I pass a bronze brush down with hoppe's no.9, it comes out with black on it and around the coils of the brush... figures it is actually removing the essence of my brush... when I read that 4th post, looked at my other 2 degenrated 30 cal brushes now 25 cal and 22 cal, one thing slipped my mouth, to quote the famous Homer Simpson "DOH!" I will see about using steel wool and perhaps a small piece of brillo pad... but it's not the bore that's leaded, it's just the very entrance of the bore around the rim where the Russkies counterbored the muzzle. The next time I slug a bore, I will do it from the reciever I swear! How far down the bore do you have to push the lead to get an accurate reading?
 
I had a 1943 Remington 03-A3 Springfield with a two groove barrel it was .314 at the throat, .309 in the middle and .312 at the muzzle. (The lands should be .300 and the grooves .308)

If you push it through all the way from back to front you will read the smallest diameter.

The hot gasses normally start eroding just ahead of the chamber and 2 to 4 inches into the bore will be the largest area. The muzzle wears because it gets “sand blasted” by pushing out any dirt, debris, dust that has entered the muzzle bore.

On your Mosin your just looking for the tightest reading to get your bore size, push it all the way through. (one way street, back to front the same direction as the bullet travels down the bore.

Below are British .303 bore gauges to test bore size, BUT the manual states that shooting the rifle will be the ultimate test in deciding to replace the barrel.

boregauge.jpg


boregauge-2.jpg
 
I have used a green scour pad and gunoil and it has cleaned up the leading issue. Thank heavens!
I'll remember to slug the bore from the other direction next time with good smaller leads
 
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