Change the main spring?

DaveinTN · 04-15-2007, 10:00 PM

I really liked the looks of CHRISW's pieced together Luger in the "All P-08 Military Lugers" portion of the forum. I have a nice shooter with a new 4" barrel, but would consider putting in a 6" in lieu of buying another pistol.

Because of the increased mass of the barrel (going from 4" to 6"), does any modification need to be made to the main spring?

Many thanks,

Dave in TN.

Here's a photo of CHRISW's Luger.

stefanosg · 04-19-2007, 08:20 AM

I don't know this from fact, but my experience has shown me that you don't need to. I have a six on a frame that has had both a four and an arty top on it at one time or another, and they all shot fine. Its my ultimate po'boys shooter. I have all three tops and one frame, and I take whatever upper I feel like shooting that day.

Karl · 04-19-2007, 07:40 PM

Dave,

In my experience a stronger main spring is not necessary. I recommend the 6" barrel for a shooter. For me, the longer sight radius makes a big difference and in my opinion the longer barrel just looks better in terms of proportions. I would also recommend installing a taller front sight (fashioned from a sight blank) so that you can shoot at "point of aim" at reasonable shooting distances, like 50 feet instead of 50 meters. FYI, I recall an add from Sarco in a recent Shotgun News for 6" barrels with a navy type raised sight base. KFS

Edward Tinker · 04-19-2007, 08:03 PM

I agree with these guys, a 6 inch is a nice shooter.

Karl, haven't "heard" from you in a while, hope you've been doing well

Ed

DaveinTN · 04-19-2007, 11:20 PM

Karl,

You mean that if I were to have a 6" barrel with a standard sight installed, the gun would shoot "high" unless I had a taller front sight put in? I would have thought the platform for the sight would have been raised slightly to compensate for the taper of the barrel.

Or on the other hand, the taper should be more gradual with a 6" rather than with a 4" barrel but the site platform on either barrel would be at the same height relative to the rear sight...

A deep problem for a shallow mind (which I have).

Dave in TN.

Lugerdoc · 04-20-2007, 09:19 AM

Dave, Sarco's high front sight base 6" barrel are designed to be used with their 2 position "Navy type" rear sight. I have both in stock at Sarco's prices. I also have their standard low base barrels in stock @$100 + $100 for installation. hellerarms@webtv.net

Alx · 04-22-2007, 08:44 PM

Dave, the 6" hits higher and needs a taller front sight because the round is in the barrel longer, pushing the gun back and the muzzle up in your hand, the gun pivoting into your web, making the muzzle rise. A bullet will do the same for a 4" but it takes less time in the barrel. Until the gasses are no longer pushing the gun - and its inertia keeps it going. The longer time the bullet is in the barrel the more recoil force. My 6" conversion also needed a taller sight, taller than any stock P08 Luger sight, to hit POI at the POA.

Alx · 04-22-2007, 08:49 PM

Lugerdoc's offer is a really great deal, 200 installed, takes a shooter from having a worn-out bore into a 'Navy'-length shooter that looks new to a chambered bullet.

04-15-2007, 10:00 PM	#1
DaveinTN User Join Date: Nov 2006 Location: Tennessee Posts: 186 Thanks: 3 Thanked 15 Times in 11 Posts	Change the main spring? I really liked the looks of CHRISW's pieced together Luger in the "All P-08 Military Lugers" portion of the forum. I have a nice shooter with a new 4" barrel, but would consider putting in a 6" in lieu of buying another pistol. Because of the increased mass of the barrel (going from 4" to 6"), does any modification need to be made to the main spring? Many thanks, Dave in TN. Here's a photo of CHRISW's Luger. Attached Images

04-19-2007, 08:20 AM	#2
stefanosg User Join Date: Jan 2006 Location: East Central Florida Posts: 367 Thanks: 1 Thanked 7 Times in 2 Posts	I don't know this from fact, but my experience has shown me that you don't need to. I have a six on a frame that has had both a four and an arty top on it at one time or another, and they all shot fine. Its my ultimate po'boys shooter. I have all three tops and one frame, and I take whatever upper I feel like shooting that day. __________________ "When the people fear their government, there is tyranny; when the government fears the people, there is liberty."

04-19-2007, 08:03 PM	#4
Edward Tinker Super Moderator Eternal Lifer LugerForum Patron Join Date: Jun 2002 Location: North of Spokane, WA Posts: 15,962 Thanks: 2,063 Thanked 4,592 Times in 2,114 Posts	I agree with these guys, a 6 inch is a nice shooter. Karl, haven't "heard" from you in a while, hope you've been doing well Ed __________________ Edward Tinker ************ Co-Author of Police Lugers - Co-Author of Simson Lugers Author of Veteran Bring Backs Vol I, Vol II, Vol III and Vol IV

04-20-2007, 09:19 AM	#6
Lugerdoc Patron LugerForum Patron Join Date: Jun 2002 Location: POB 398 St.Charles,MO. 63302 Posts: 5,089 Thanks: 6 Thanked 737 Times in 484 Posts	Dave, Sarco's high front sight base 6" barrel are designed to be used with their 2 position "Navy type" rear sight. I have both in stock at Sarco's prices. I also have their standard low base barrels in stock @$100 + $100 for installation. hellerarms@webtv.net __________________ Tom Heller POB 398 ST.Charles, MO. 63302 Tel 636-447-3006 lugerdoc@charter.net

04-19-2007, 07:40 PM	#3
Karl Lifer - Twice Over Lifetime Forum Patron Join Date: Jun 2002 Location: Savannah Posts: 530 Thanks: 0 Thanked 280 Times in 123 Posts	Dave, In my experience a stronger main spring is not necessary. I recommend the 6" barrel for a shooter. For me, the longer sight radius makes a big difference and in my opinion the longer barrel just looks better in terms of proportions. I would also recommend installing a taller front sight (fashioned from a sight blank) so that you can shoot at "point of aim" at reasonable shooting distances, like 50 feet instead of 50 meters. FYI, I recall an add from Sarco in a recent Shotgun News for 6" barrels with a navy type raised sight base. KFS

04-19-2007, 11:20 PM	#5
DaveinTN User Join Date: Nov 2006 Location: Tennessee Posts: 186 Thanks: 3 Thanked 15 Times in 11 Posts	Karl, You mean that if I were to have a 6" barrel with a standard sight installed, the gun would shoot "high" unless I had a taller front sight put in? I would have thought the platform for the sight would have been raised slightly to compensate for the taper of the barrel. Or on the other hand, the taper should be more gradual with a 6" rather than with a 4" barrel but the site platform on either barrel would be at the same height relative to the rear sight... A deep problem for a shallow mind (which I have). Dave in TN.

04-22-2007, 08:44 PM	#7
Alx User Join Date: Sep 2006 Location: Nashville, Tennessee area Posts: 263 Thanks: 5 Thanked 3 Times in 3 Posts	Dave, the 6" hits higher and needs a taller front sight because the round is in the barrel longer, pushing the gun back and the muzzle up in your hand, the gun pivoting into your web, making the muzzle rise. A bullet will do the same for a 4" but it takes less time in the barrel. Until the gasses are no longer pushing the gun - and its inertia keeps it going. The longer time the bullet is in the barrel the more recoil force. My 6" conversion also needed a taller sight, taller than any stock P08 Luger sight, to hit POI at the POA.

04-22-2007, 08:49 PM	#8
Alx User Join Date: Sep 2006 Location: Nashville, Tennessee area Posts: 263 Thanks: 5 Thanked 3 Times in 3 Posts	Lugerdoc's offer is a really great deal, 200 installed, takes a shooter from having a worn-out bore into a 'Navy'-length shooter that looks new to a chambered bullet.