enlarging a Barnes TSX diameter with paint

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  • Last Post 01 December 2021
BJung posted this 17 August 2021

I want to enlarge the diameter of a Barnes TSX from .311 to .312".Has anyone enlarged the diameter of a jacketed bullet - or in this case a copper bullet - using liquid teflon, liquid enamel, or powder coating? I am thinking of dipping a bullet's shank into liquid paint and then baking it, or heating the bullet and dipping it in powder paint before baking it.

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David Reiss posted this 17 August 2021

No, but keep in mind this is the Cast Bullet Association forum, so the answer you want may not be here. 

David Reiss - NRA Life Member & PSC Range Member Retired Police Firearms Instructor/Armorer
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lotech posted this 20 August 2021

Conventional jacketed bullets are pretty forgiving about diameter with slightly undersized bullets capable of good accuracy. Perhaps a Barnes copper bullet would work similarly. I don't know anything about painted or coated bullets and this may work in your situation, but you might try the Barnes as is for comparison. 

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Bud Hyett posted this 20 August 2021

I shot with a man in California who paper-patched jacketed bullets to fit odd-sized bores. I do not know if you can paper-patch this thin for an added .001 total diameter. 

The second possibility is to bump the bullet in a .313 or .314 die to allow for springback after bumping.

If the bullet is flat-base, it should bump up .001 as the bullet hits the leade before beginning rotation. This is how I've known I had an oversize bore when experimenting with a new rifle; the rifle would shoot flat-base well, but not boattail bullets. 

Farm boy from Illinois, living in the magical Pacific Northwest

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John Alexander posted this 21 August 2021

Is there any reason that a jacketed bullet couldn't have it's diameter enlarged by .001 or .002" by powder coating just as cast bullets are?

John

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JeffinNZ posted this 21 August 2021

It's difficult to imagine a rifle barrel noticing a thou difference.  A good example is many .303 Brits shoot just as well with bullets .310-.312 inch.

Cheers from New Zealand

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John Alexander posted this 21 August 2021

Jeff is right my Tikka shoots .224 bullets into under one inch groups with a barrel that slugs at .225.  Just shoot it and see what happens.

John

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BJung posted this 24 August 2021

Thanks for your replies. I've tested the Barnes once along with Speer .311-150sp and Hornady .312sp. The Hornady test loads grouped better. I'm guessing it's the bullet diameter. I want a decent hunting bullet load for my rifle and CA only approved copper bullets. Unfortunate because I would prefer to hunt with a bullet I cast and used to assemble my hunting cartridge myself.

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Geargnasher posted this 01 December 2021

You could use the new Rotometals lead free bullet casting alloy. It's been fixed with the addition of .75% antimony. Instructions and link to a forum thread explaining how to use it on the Rotometals product page. If you're really interested, message me.

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