.45 ACP Bore Gauge

Jack_Bauer24 · February 26, 2010, 12:32 PM

Anyone know where I might find a bore gauge for a .45 ACP

**Unclenick** · February 26, 2010, 06:31 PM

I've only ever owned one for .30 Cal rifles because the military rifles used to get so much cleaning from the muzzle that it funneled the muzzles. For other calibers, I slug them with a Hornady swaged lead ball a little large for the caliber. Run an oily patch through the bore. Tap the ball into the muzzle with a plastic head hammer, then gently push it out from the other end with a cleaning rod and mic it. If you are working with a blind breech end, put an appropriate length of dowel or brass rod in first and push the slug out with that afterward. It isn't hard to push out unless you make the mistake of using a cast bullet alloy instead of pure lead.

Johnsusername · February 26, 2010, 10:49 PM

You mean one of these?
http://www.mitutoyo.com/TerminalMerc...spx?group=1517

Try MSC

John

**Unclenick** · February 27, 2010, 05:41 PM

Not for slugs. You need an OD mic for them.

I think the gauge he is looking for is just a tapered hardened steel plug whose taper spans the range of acceptable bore diameters. It drops in at the muzzle and engraved bands mark each thousandth of diameter. The advantage it has over the dial bore gauge is it works equally well with either odd or even numbers of lands.

February 26, 2010, 12:32 PM	#1
Jack_Bauer24 Senior Member Join Date: August 16, 2007 Posts: 147	.45 ACP Bore Gauge Anyone know where I might find a bore gauge for a .45 ACP __________________ "When the people fear the govt there is tyranny, when the govt fears the people there is liberty." Thomas Jefferson

February 26, 2010, 06:31 PM	#2
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,060	I've only ever owned one for .30 Cal rifles because the military rifles used to get so much cleaning from the muzzle that it funneled the muzzles. For other calibers, I slug them with a Hornady swaged lead ball a little large for the caliber. Run an oily patch through the bore. Tap the ball into the muzzle with a plastic head hammer, then gently push it out from the other end with a cleaning rod and mic it. If you are working with a blind breech end, put an appropriate length of dowel or brass rod in first and push the slug out with that afterward. It isn't hard to push out unless you make the mistake of using a cast bullet alloy instead of pure lead. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

February 27, 2010, 05:41 PM	#4
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,060	Not for slugs. You need an OD mic for them. I think the gauge he is looking for is just a tapered hardened steel plug whose taper spans the range of acceptable bore diameters. It drops in at the muzzle and engraved bands mark each thousandth of diameter. The advantage it has over the dial bore gauge is it works equally well with either odd or even numbers of lands. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

February 26, 2010, 10:49 PM	#3
Johnsusername Junior Member Join Date: February 21, 2010 Location: NH Posts: 14	You mean one of these? http://www.mitutoyo.com/TerminalMerc...spx?group=1517 Try MSC John