Crosman 600 Restoration Part 3 of 3 (mods)
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All Springer/NP/PCP Air Gun Discussion General
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Vintage Air Gun Gate
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Rocker1
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Crosman 600 Restoration Part 3 of 3 (mods)
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Topic: Crosman 600 Restoration Part 3 of 3 (mods) (Read 4844 times))
WyoMan
Sharp Shooter
Posts: 839
Real Name: Gary
Crosman 600 Restoration Part 3 of 3 (mods)
«
on:
February 11, 2017, 12:25:28 AM »
First mod was a longer barrel a 10.5 long cut from a choked LW blank:
Turned the muzzle to .437:
Then the breech to .374:
The exposed part of the barrel needs to be about .430 for end cap clearance:
The last cut was a freehand taper:
Shown with adapter:
The shoulder (.374 to .430) fits tight to the frame. If the face cut on the breech was cut right, then the feed arm gap to the barrel will be .002 to .003:
Another pic:
The feed arm gap is ok so I can cut the leade-in next:
Using this 7 deg rotary fine-cut file:
The idea is to get it started, but, leave enough to finish cut with sandpaper rolls, rubber polishing bits or your favorite finishing method.
Finished with new barrel:
Next mod was to get some sight aid so I could shoot something better than a 2 group.
Started with some flat dovetail stock and cut off a 4-3/4 long section:
Measured and drilled to use the rear sight screw and barrel set screw locations. This will anchor the rail. Also made some clearance cuts:
Also cut a slot in the bottom so it would sit flat on the ribbed frame. The rear screw is a 6-40 x 5/8 shcs, and the front is a modified 10-32 with a small o-ring for a washer:
Attached to the gun:
The last thing was a some more pre-load on the spring. With a longer barrel, in theory, you can hit the valve a little harder.
I built the other one the same and added some wood grips and optics:
They shoot around 480 to 500 fps with H&N 13.73 gr. Heres three 10-shot groups from each gun, 10m, rested.
Part1:
https://www.gatewaytoairguns.org/GTA/index.php?topic=121809.msg1181445#msg1181445
Part2:
https://www.gatewaytoairguns.org/GTA/index.php?topic=121810.msg1181446#msg1181446
Thanks -
Wyo
«
Last Edit: July 04, 2017, 11:38:39 PM by WyoMan
»
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Wyoming
45flint
GTA Senior Contributor
Posts: 4070
yes
Real Name: Steve
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #1 on:
February 11, 2017, 09:20:41 AM »
Awesome, you guys that can machine things amaze me.
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Wooster, Ohio
Hobbyman2007
N.U.A.H. Expert
GTA Senior Contributor
Posts: 3011
yes
Real Name: Denis
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #2 on:
February 20, 2017, 08:17:59 PM »
Absolutely beautiful Wyo. I can't believe the amount of work that went into these pistols ,not to mention the all metal parts . They sure don't make them like they used to.
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Dowling,Ontario, Canada
I like air guns ,and they like me
ax57
Plinker
Posts: 141
yes
Real Name: Rick
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #3 on:
February 20, 2017, 10:33:03 PM »
I love to see build/mod threads like this where the workmanship is of such high quality and each step is well-documented with photographs. Threads like this really do inspire some of us to start our projects. (Not that I could do work like this.)
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Cornville, AZ
WyoMan
Sharp Shooter
Posts: 839
Real Name: Gary
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #4 on:
February 21, 2017, 11:42:30 PM »
Thanks, guys. I appreciate that. I'm not really a machinist, though... more like a caveman... ice age era:
Wyo
«
Last Edit: July 04, 2017, 11:39:25 PM by WyoMan
»
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Wyoming
Grandspud
Shooter
Posts: 54
No matter where you go... there you are!
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #5 on:
October 05, 2017, 11:22:13 PM »
Wow! Thanks for the detailed information, especially the close-up photos of the action's springs. I have a few C 600s and this will help me greatly.
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Southern California
Viper1357
Plinker
Posts: 227
Real Name: Mark
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #6 on:
November 22, 2017, 10:59:45 PM »
I'll just add my thanks here as well and hang on to your 3 threads. The detailed explanations and pics are really helpful. I have a C 600 that I inherited from my Father-in-Law in the late 80's, and sadly didn't start re-shooting it (not sure the last time he did either) until the mid 90's, but since then I shoot it 2 to 3 times a year. It still holds air and 'seems' powerful enough. I just got a chrony, so after reading your 600 restoration, I guess it's time to test mine and see if mine needs one.
Thanks again!
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USA, MN
kelvinator
Plinker
Posts: 240
yes
Real Name: Kelvin
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #7 on:
November 24, 2017, 10:44:13 AM »
Wow, very nice work.
This is exactly how I would do a 600, if I could.
If you ever decide to part with one, I call 1st dibs, HA.
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Hickory Creek, Texas
Benjamin 342 Racine
Benjamin 392 Limited Edition #354 of 500
1964 Silver Streak Mac-1 Steroid
1965 Blue Streak
Crosman 160 3rd variant
Beeman R1 Santa Rosa .20 Laser
Crosman MKI
WD Feese
Plinker
Posts: 229
yes
Real Name: WD Feese
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #8 on:
November 25, 2017, 07:47:12 PM »
Great post. Bought a 600 about an hour ago at an antique mall. Perfect timing. Thanks.
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Jefferson City, Missouri
63FI
Shooter
Posts: 8
yes
Real Name: Lou
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #9 on:
July 17, 2020, 12:22:40 PM »
My 600 needs quite a bit of work and I am glad to find this 3 part article. Thanks to everyone involved!!
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USA Hamilton TWP, New Jersey
rocks
Shooter
Posts: 52
yes
Real Name: RON
Re: Crosman 600 Restoration Part 3 of 3 (mods)
«
Reply #10 on:
July 19, 2020, 04:17:49 PM »
Hi Lue send it to Henry Ford in south Carolina FIND HIM ON E-BAY CROSMAN600REPAIR, HE'S DAME GOOD
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USA, CT, Tolland
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Crosman 600 Restoration Part 3 of 3 (mods)