Winchester 1977XS .22 Conversion
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Winchester 1977XS .22 Conversion
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Topic: Winchester 1977XS .22 Conversion (Read 4839 times - 2 votes)
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WrongSide
Shooter
Posts: 98
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Real Name: Ken
Winchester 1977XS .22 Conversion
«
on:
January 23, 2021, 12:00:39 AM »
Thought I would share some pics of the Winchester 1977 XS I converted into .22.
It involved using parts from my first Daisy 880 (purchased from W-Mart last May) and my second Winchester 1977 XS (purchased from TSC during Black Friday Days). My first Win1977 is stock with a Geo LDC and shoots JSBs into 1/2" groups at 20 yds, so I don't want to change this set up.
Here's pic of the new Win-.22 and Daisy 880 with swapped parts.
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USA, CA, San diego
WrongSide
Shooter
Posts: 98
yes
Real Name: Ken
Re: Winchester 1977XS .22 Conversion
«
Reply #1 on:
January 23, 2021, 12:07:13 AM »
The Win-.22 has a Geo LDC, a 14.5" Crosman .22 barrel, and the 880 receiver and stock. I prefer the 880 stock over the Win1977 thumbhold stock. I did the credit card trigger mod on my 880 and liked the trigger so much that I decided to put the .22 barrel in that receiver instead of the Win1977 receiver. I just swapped out the bolts from the two rifles so that the .22 has the double O-ring bolt. I also ended up drilling out the valve body trigger assembly breach to accept the .22 pellets. Also had to remove some plastic from the 880 receiver plastic to accept the larger 7/16" diameter of the .22 barrel.
Here are some more pics:
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USA, CA, San diego
WrongSide
Shooter
Posts: 98
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Real Name: Ken
Re: Winchester 1977XS .22 Conversion
«
Reply #2 on:
January 23, 2021, 12:25:09 AM »
With the 880 receiver and valve trigger assembly I didn't have to change the trigger spring for the .22 conversion. I can pump the Win-.22 up to 12 times and still fire with no apparent problems (but less than 20 shots so far). I did the credit card trigger mod on my first Winchester 1977 and the improvement in the trigger pull was not as noticeable as with the Daisy 880, so this is one of the reasons why I chose to use the 880 valve-trigger body for this conversion instead of the Winchester's assembly. I also used the Daisy 880 receivers since it seemed more acceptable to ruin these instead of the "more expensive" Winchester receivers, even though both are nearly identical. The Win-.22 can shoot JSB 15.89 Exacts around 635 fps for around 14 FPE. Based on a small shooting sample of two 5-shot/12-pump groups at distance of 53' (my backyard normal shooting range distance) I was able to get a 1/2" and a 5/8" group. Three 9-pump groups came in at just under 3/4", but 9 pumps average 583 fps (a little over 11 FPE).
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USA, CA, San diego
WrongSide
Shooter
Posts: 98
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Real Name: Ken
Re: Winchester 1977XS .22 Conversion
«
Reply #3 on:
January 23, 2021, 12:28:25 AM »
A few more pictures.
Had to drill the original Winchester 1977 barrel stabilizer to accept the wider 7/16" .22 barrel.
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USA, CA, San diego
WrongSide
Shooter
Posts: 98
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Real Name: Ken
Re: Winchester 1977XS .22 Conversion
«
Reply #4 on:
January 23, 2021, 12:42:56 AM »
Summary of my Win-.22 conversion:
- Daisy 880 valve-body-trigger assembly, plastic receiver halves and plastic stock (thinking of ordering the 880 black stock so the .22 conversion doesn't look so much like a Frankenstein rifle)
- 14.5" Crosman .22 barrel (breach end reduced down to 0.30" using bench grinder and cordless drill)
- Win1977 for everything else, except removed front site and cut the barrel shroud to fit 14.5" barrel plus leaving enough barrel tip to support the LDC
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USA, CA, San diego
35 shooter
Expert
Posts: 1947
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Real Name: Buddy
Re: Winchester 1977XS .22 Conversion
«
Reply #5 on:
January 23, 2021, 01:06:48 AM »
Nice conversion. I do have a question on the bolt though. Do I understand you used the 1977 bolt as is for the 22 conversion?
Nice power from your conversion also.
I’ll be glad when daisy gets all the parts in stock for the 1977... like the piston and other parts that are different from the 880.
I think a lot of experimenting will happen then.
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USA, MS, Collins
WrongSide
Shooter
Posts: 98
yes
Real Name: Ken
Re: Winchester 1977XS .22 Conversion
«
Reply #6 on:
January 23, 2021, 03:33:57 AM »
Yes, it's a straight swap of the bolts with no modifications. The breech opening was drilled slightly larger so that .22 pellets wouldn't get stuck when loading, but that doesn't appear to affect the bolt probe seal. I forgot to mention that I also had to ream (bevel?) the entry of the .22 barrel so that the pellet doesn't get caught on the front edge of the barrel when pushing the bolt forward (guess my crude method of reducing barrel outer diameter didn't align barrel opening with breech adequately). It was difficult to fully push the pellet forward and close the bolt until I did this. I've placed a small piece of tissue paper over the bolt when shooting to see if any air blows back through the bolt probe seals through the shot cycle, and the tissue didn't fly off. It's much easier loading .22 pellets than the .177s. I have small hands and don't have too much trouble with the smaller pellets, but I'm definitely appreciating the easier loading with .22s.
I'm not sure if replacement Win1977 parts from daisy will be very helpful for modding since I had to use the Win1977 pump frame/tube/piston/arm assemblies. There are differences in the lengths of these components between the two models. Otherwise I would've used the 880's brown forearm covers to match the brown buttstock on the .22. The 880 forearm screw holes don't line up with the Win1977 pump frame.. But the rear stocks are interchangeable.
I can't remember if the piston-arm assemblies are different lengths, but since pump tube is longer in the Win1977 I think it makes sense if the piston arm is also longer to get higher compression ratio.
I haven't pumped my first Win1977 more than 10 times, but seems like it should be doable since the Daisy 880 valve body trigger assembly can handle the higher 12-pump pressure when mated to the Win1977 pump frame/tube/piston/arm combo.
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USA, CA, San diego
WrongSide
Shooter
Posts: 98
yes
Real Name: Ken
Re: Winchester 1977XS .22 Conversion
«
Reply #7 on:
January 23, 2021, 03:59:34 AM »
Also should mention that without the Geo LDC the .22 is about as loud as my stock Benjamin 392 at 8 pumps. I would say probably not backyard friendly without the LDC if you have relatively close neighbors.
I really like the stubby look of the shorter barrel, but it's too loud. At least with the LDC it's about same length as a stock 880 (36" inches long). Highly recommend Geo's LDCs for the 880/ Win1977 platforms in .177 and for air guns with Crosman .22 barrels. I have 2 of each and very satisfied with their performance. I have no affiliation with Geo and this is an unsolicited testimony by me. Just wanting to show my appreciation for the mods and reviews he provides on his site.
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USA, CA, San diego
35 shooter
Expert
Posts: 1947
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Real Name: Buddy
Re: Winchester 1977XS .22 Conversion
«
Reply #8 on:
January 23, 2021, 04:26:15 AM »
Plus 1 for Geo’s ldc’s. I’ve got them on my 880 and my 1977.
Squirrels don’t have a clue what’s going on!
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USA, MS, Collins
WrongSide
Shooter
Posts: 98
yes
Real Name: Ken
Re: Winchester 1977XS .22 Conversion
«
Reply #9 on:
January 23, 2021, 01:40:52 PM »
Found some pictures from last October of my first 1977 disassembled to compare with my first 880.
A picture of the 880 and 1977 barrel shrouds (see the difference in locations for the forearm cover screws).
Also a picture of the two piston assemblies. The 1977 version has the metal spring and two O-rings versus the elastomer spring and single O-ring for 880s. The 1977 piston arm is slightly longer than 880 piston arm in terms of where pivot holes are located.
Finally, picture of the two pump arms (the 1977 pump arm is longer than 880 pump arm). The 880 plastic receiver/trigger guard works with the Win1977 pump frame/pump arm. However, it feels like the handle-end of the 1977 pump arm is making contact with the 880 trigger guard because it makes more plastic-on-plastic hitting noise when pumping compared to my stock 1977, but the pump handle stays put after each shot (handle doesn't fall away from the rifle). Conversely, the 880 pump arm doesn't make contact with the 1977 trigger guard and the pump arm is loose (it will drop until I cock the bolt and give at least one pump). The pump arm drops once piston arm compression force is relieved after each shot. I've learned to keep my left hand under the pump arm when shooting the chopped 880 (not my normal way to hold an 880/1977). I removed the spring that normally holds the pump arm next to the rifle to quiet the pumping noise for my 3 rifles.
«
Last Edit: January 23, 2021, 01:43:37 PM by WrongSide
»
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USA, CA, San diego
SouthBender
Shooter
Posts: 48
yes
Real Name: Stephen
Re: Winchester 1977XS .22 Conversion
«
Reply #10 on:
January 26, 2021, 12:32:38 AM »
Thanks for posting all your work on this. I've been curious to know more about the Win1977 since November, so I appreciate seeing what's worked for you. Two questions: Was it hard to remove the original soda straw barrels from the cast metal receivers they come embedded in? When you put the Win1977 front end on the 880 receiver (with the credit card trigger mod) did the trigger change its behavior or is it still acting nicely for you?
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South Bend, IN
WrongSide
Shooter
Posts: 98
yes
Real Name: Ken
Re: Winchester 1977XS .22 Conversion
«
Reply #11 on:
January 26, 2021, 08:03:00 PM »
@SouthBender - It was not difficult getting the barrels off the respective 1977/880 valve-body-barrel-trigger assemblies. I used the small butane torch from Lowes to warm up the aluminum(?) bodies, but first removed everything that was removeable (pump tube, O-rings, abutment and seals, valve assembly, trigger assembly, etc.). I wrapped an old bicycle innertube several times around the barrel (near the muzzle end) and clamped it in a bench vice. Then heated the aluminum body with torch, about 5 seconds at a time waving torch back and forth over the body of the assembly where it mates with the barrel, and avoided directly heating the barrel. Don't need to heat anything to the point of glowing!
After each heating, I would twist the body around the secured barrel (I wore a thick leather work gloves and made sure I wasn't burning the leather or my hand), and eventually it started to give. After heating and twisting the body about half way off the barrel I switched to a small block of wood and a hammer to tap the body off the barrel (gentle taps and try to spread the blows evenly around the barrel instead of just one spot). First time I accidentally let the body fall to the ground and was worried I might've damaged it, but it was okay. Each subsequent time I removed body from barrel I made sure the body landed in a box with rag in it to cushion the landing.
Putting the barrel back into the valve body involved securing the "naked" body in bench vice (I had a rag around the body to prevent marring the surface), slowly heated the body with torch and used block of wood and hammer to tap the barrel crown end so that it would slide into the body. I think I heated the body for a couple of 5-sec burns, and tried to gently tap the barrel into the body in-between heating. Eventually the breech end of barrel slid partially into the body, so at that point I just continued tapping barrel crown end with wood block and hammer until barrel was seated all the way (about 1/2" of breech end is seated in the body).
Reassembling the 1977 did not affect the trigger behavior at all. The 880's valve body/trigger assembly was just as good in the modded 1977 as when it was all 880 components.
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Back_Roads
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Re: Winchester 1977XS .22 Conversion
«
Reply #12 on:
January 27, 2021, 09:35:42 AM »
Nice mods there ! After my .30 experiment, I came to the conclusion that the 880 may be able to go as big as .25 cal and still have decent power. I have a ,25 Airforce barrel and a .22 Beeman dual cal barrel for my next attempts of cal upgrades.
Nice photos and instructions I was vague on the images etc. on my build, by the time I had it back together, I would remember I forgot to take pics LOL
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SouthBender
Shooter
Posts: 48
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Real Name: Stephen
Re: Winchester 1977XS .22 Conversion
«
Reply #13 on:
January 27, 2021, 02:07:58 PM »
Excellent description of the process! I can see what you're describing. Thank you. I wonder if chilling the whole setup beforehand (to shrink the barrel) would make things any easier.
And glad to hear the trigger behaves well after the swap. I'm getting more interested in attempting this myself...
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South Bend, IN
Ronno6
GTA Senior Contributor
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Real Name: Ron
Re: Winchester 1977XS .22 Conversion
«
Reply #14 on:
January 28, 2021, 12:18:34 AM »
Tonight I stumbled onto a bunch of 822 parts just as they were being listed.
New style valve/trigger/barrel assemblies, bolts, and metal receivers.
Also wood furniture for (almost) 2 guns..missing 1 forearm.
I am going to attempt a conversion of one or 2 1977's to .22 using these components, and hopefully will have wood furniture to boot.
Will have metal receivers, but I guess I still will have to use plastic pump arms.....bummer
Are the forearms on the 1977 longer than those of the 880? Seeing how the screws are in different locations, does that mean the 1977 forearms are longer?? May have to make my own wood parts there...
I hope the barrels are the same length...............hmmmm
Gonna attack this beast from a different direction without sacrificing any of my 822's..........
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USA, Stone County, MS
You can lead a man to water, but you can't keep him from urinating in it.
Ronno6
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Posts: 5025
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Real Name: Ron
Re: Winchester 1977XS .22 Conversion
«
Reply #15 on:
January 28, 2021, 09:16:44 AM »
Well, I should learn to read further.........
Barrels were damaged and not included......bummer.
So, now I'll need to find a couple .22 barrels; but, I don't have to worry about length! (not exactly a silver lining, but maybe pewter...)
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USA, Stone County, MS
You can lead a man to water, but you can't keep him from urinating in it.
Ronno6
GTA Senior Contributor
Posts: 5025
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Real Name: Ron
Re: Winchester 1977XS .22 Conversion
«
Reply #16 on:
January 28, 2021, 01:55:25 PM »
I found Numrich straw barrel 6 groove 1/16 twist that will do nicely.
Can also use for my 2100 .22cal conversion project as well..................
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USA, Stone County, MS
You can lead a man to water, but you can't keep him from urinating in it.
Ronno6
GTA Senior Contributor
Posts: 5025
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Real Name: Ron
Re: Winchester 1977XS .22 Conversion
«
Reply #17 on:
January 28, 2021, 05:58:30 PM »
From what I can tell the whole pump assy is longer to accommodate the longer strpke.
Pump frame is longer, pump tube, and the forearms.
Looks like I'll be making those from scratch on my 1922.........
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USA, Stone County, MS
You can lead a man to water, but you can't keep him from urinating in it.
WrongSide
Shooter
Posts: 98
yes
Real Name: Ken
Re: Winchester 1977XS .22 Conversion
«
Reply #18 on:
January 29, 2021, 01:11:40 AM »
Yes, all mentioned parts are longer than 880 counterpart.
What is OD of the Numrich barrel? A 0.30" OD .22 barrel would've been nice to start with, versus how I used a cordless drill and bench grinder on the 7/16" (0.4375") Crosman barrel.
But I'm happy with the results.
Can't wait to see the results.
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USA, CA, San diego
Ronno6
GTA Senior Contributor
Posts: 5025
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Real Name: Ron
Re: Winchester 1977XS .22 Conversion
«
Reply #19 on:
January 29, 2021, 06:24:07 AM »
https://www.jgairguns.biz/barrel-liners-c-78_2066_2543/gpc588180-22-caliber-barrel-liner-p-15961.html
The Numrich barrel is .315" OD
They also have one a tad smaller...like .305 if memory serves.
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USA, Stone County, MS
You can lead a man to water, but you can't keep him from urinating in it.
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Winchester 1977XS .22 Conversion