Pics or accurate description of bolt used for DIY crown job?
- Thread starter dwcopple
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Say what? 
That’s a bad idea. Please take your Model 10 to a gunsmith who can do the job properly.
That’s a bad idea. Please take your Model 10 to a gunsmith who can do the job properly.
Protocall_Design
Vendor
Recrowning won't do any good without the proper piloted cutter. If the crown is off center, (many are from the factory) you need the cutter accurately centered to the bore. Then cutting the crown will make it concentric to the bore, which is critical to accuracy.
Any dome head brass bolt. I think Brownell has a video on their site. Yes a lath or piloted cutter can straighten a crooked or chopped off barrel. But if it is only dinged give it a chance wont hurt it. My opinion only.
lefty_jake
Member
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Are you trying to solve a cosmetic problem, or a proven accuracy problem, or something else? I realize my question is a little off topic from your question about how to improve a crown, but I'm curious.
gwpercle
Member
Use a Brass Round Head Bolt . The head has to be larger than the bore size . I like to use a bolt with a head about twice the size of the bore , exact size is not critical.
The old NRA Gunsmith guide says to clamp the barrel in an upright position, chuck bolt in variable speed electric handdrill , coat with valve grinding compound , run med speed and with the bolt head on the muzzle , make the drill go around in a tight circle . Years ago I cut and crowned a barrel this way but I would now buy a brass ball to use in place of the bolt.
Holding the drill in your hands and making it go in a tight circle works a lot better than it sounds. When the crown looks even all the way around you're done.
Gary
The old NRA Gunsmith guide says to clamp the barrel in an upright position, chuck bolt in variable speed electric handdrill , coat with valve grinding compound , run med speed and with the bolt head on the muzzle , make the drill go around in a tight circle . Years ago I cut and crowned a barrel this way but I would now buy a brass ball to use in place of the bolt.
Holding the drill in your hands and making it go in a tight circle works a lot better than it sounds. When the crown looks even all the way around you're done.
Gary
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Arquebus357
Member
My crowning tools. There is also a round white one that seems to have gone walkabout.
cgt4570
SWCA Member
I have also (carefully) used Dremel type cones and balls, then lapping compound. I have a shooter Swedish Mauser Carbine that had been cut with a hacksaw. I crowned it myself and it shoots sub minute all day long.
