Brasser Question

sltm1 · April 20, 2013, 06:36 PM

I finally got around to firing my new/old Uberti G&G that I shortened the bbl on. Love the gun and it's pretty damn accurate too. Standard wisdom is to never shoot it with a conversion cylinder and I friend of mine asked me why not using Schofield 45 loads? I didn't have an answer, they are only 20g of powder but what would the pressure change be using a casing instead of filling a cylinder if any?

Doc Hoy · April 20, 2013, 06:52 PM

...The difference in weight and diameter of the bullet?

and

How does that effect the forces on the revolver?

Hellgate · April 20, 2013, 10:09 PM

I would assume the Scofield load would be a 200gr bullet. That would likely be higher pressure to blow it out of the gun even with 20grs powder. Also a bigger slug is gonna have more resistance due to its weight and larger bearing surface thus putting more stress on the gun to pull the arbor out of the frame when being pushed down the barrel. A crimped in harder bullet alloy would also add to the stress on the gun when fired. It may not be that much of a difference but I'd expect a steady diet of Scofield loads would stretch the gun out faster than just the dead soft 142gr balls.

Doc Hoy · April 21, 2013, 12:06 AM

...Seems like the forces could be significantly different

ZVP · April 21, 2013, 08:27 PM

I have shot my '58 Remington with a conversion cylinder and Scofield reloads and WOW what an accurate and sweet shooting load it is! I got a 5 shot cloverleaf @ 21 ft!
If the conversion cylinder were mine, I think I'd just leave it in the revolver qnd call it good enough! Sadly the cylinder wasn't mine. I don't know the powder charge but it was light recoiling and all BP. Rge bullet was a conical 200 grainer.
ZVP

madcratebuilder · April 23, 2013, 09:25 AM

With a open top cap and ball revolver the recoil force is spread around the arbor, when converted to cartridge this force is primary at the top of the recoil shield. This can cause cracks to develop in the frame at the trigger screw area. This was a problem in the early conversion with a steel frame, not a good idea with a brass frame.

April 20, 2013, 06:36 PM	#1
sltm1 Senior Member Join Date: February 25, 2009 Location: Idaho Posts: 353	Brasser Question I finally got around to firing my new/old Uberti G&G that I shortened the bbl on. Love the gun and it's pretty damn accurate too. Standard wisdom is to never shoot it with a conversion cylinder and I friend of mine asked me why not using Schofield 45 loads? I didn't have an answer, they are only 20g of powder but what would the pressure change be using a casing instead of filling a cylinder if any?

April 20, 2013, 06:52 PM	#2
Doc Hoy Senior Member Join Date: October 24, 2008 Location: Naples, Fl Posts: 5,440	What is... ...The difference in weight and diameter of the bullet? and How does that effect the forces on the revolver? __________________ Seek truth. Relax. Take a breath.

April 20, 2013, 10:09 PM	#3
Hellgate Senior Member Join Date: November 18, 2010 Location: Orygun Posts: 869	I would assume the Scofield load would be a 200gr bullet. That would likely be higher pressure to blow it out of the gun even with 20grs powder. Also a bigger slug is gonna have more resistance due to its weight and larger bearing surface thus putting more stress on the gun to pull the arbor out of the frame when being pushed down the barrel. A crimped in harder bullet alloy would also add to the stress on the gun when fired. It may not be that much of a difference but I'd expect a steady diet of Scofield loads would stretch the gun out faster than just the dead soft 142gr balls. __________________ With over 15 perCUSSIN' revolvers, I've been called the Imelda Marcos of cap & ball. SASS#3302 (Life), SASS Regulator, NRA (Life), Dirty Gamey Bastards #129 Wolverton Mtn. Peacekeepers (WA), former Orygun Cowboy (Ranger, Posse from Hell)

April 21, 2013, 12:06 AM	#4
Doc Hoy Senior Member Join Date: October 24, 2008 Location: Naples, Fl Posts: 5,440	That was my thought... ...Seems like the forces could be significantly different __________________ Seek truth. Relax. Take a breath.

April 21, 2013, 08:27 PM	#5
ZVP Senior Member Join Date: June 20, 2009 Posts: 1,102	I have shot my '58 Remington with a conversion cylinder and Scofield reloads and WOW what an accurate and sweet shooting load it is! I got a 5 shot cloverleaf @ 21 ft! If the conversion cylinder were mine, I think I'd just leave it in the revolver qnd call it good enough! Sadly the cylinder wasn't mine. I don't know the powder charge but it was light recoiling and all BP. Rge bullet was a conical 200 grainer. ZVP

April 23, 2013, 09:25 AM	#6
madcratebuilder Senior Member Join Date: November 2, 2007 Location: Northern Orygun Posts: 4,923	With a open top cap and ball revolver the recoil force is spread around the arbor, when converted to cartridge this force is primary at the top of the recoil shield. This can cause cracks to develop in the frame at the trigger screw area. This was a problem in the early conversion with a steel frame, not a good idea with a brass frame.