Pistolero
Well-Known Member
I bought a Brownell's muzzle crowning cutter, which does an 11 degree facing cut. I have found that
most rifles have pretty horribly uneven crowns. This thing guides on a pilot, and truly does cut true
to the bore.
Here is a shot of one of the best I have ever run into, a Marlin 336 in .30-30. It is just a hair off, when
the top is cutting a clean, sharp corner the bottom is probably .010 to .015 still uncut. Many have a
huge wide band visible uncut when you first reach a sharp corner at one side.
Here is a pic, have to look closely.
Sharp corner on right side of photo, but not reaching the bore yet on the left. This is a really good one, most are much worse.
I can't imagine the old "brass screw in a drill with valve lapping compound" would get you anywhere near a proper, square muzzle
cut, either.
Not magical, but they usually shoot a good bit more consistently after you recrown them. Some are dramatically better, like a
Win 94 that I have.
Bill
most rifles have pretty horribly uneven crowns. This thing guides on a pilot, and truly does cut true
to the bore.
Here is a shot of one of the best I have ever run into, a Marlin 336 in .30-30. It is just a hair off, when
the top is cutting a clean, sharp corner the bottom is probably .010 to .015 still uncut. Many have a
huge wide band visible uncut when you first reach a sharp corner at one side.
Here is a pic, have to look closely.
Sharp corner on right side of photo, but not reaching the bore yet on the left. This is a really good one, most are much worse.
I can't imagine the old "brass screw in a drill with valve lapping compound" would get you anywhere near a proper, square muzzle
cut, either.
Not magical, but they usually shoot a good bit more consistently after you recrown them. Some are dramatically better, like a
Win 94 that I have.
Bill
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