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FWIW, the price included a heat treating process said to make the Rockwell hardness higher. He didn’t think it would make much difference. Sorry, probably left out more....

Here’s a bit of data. Sometime back, there was a discussion about the idea of chrome or nickel plating the id of 1938b shot tubes. Today I went to a couple of places that do such things. Basically it could be done with electroless nickel to 0.175- 0.176 id. For about $125 / tube. Chrome was...

I also use a caulking gun compressor. Saw it somewhere along the way. Thanks to somebody! Maybe it was cobalt327! I’ve slept since then..... Your results with the Marksman bbs made me remember the double length 1938b shot tube project. That would be interesting to try again with the larger bbs...

I have seen some small variation in the 499b shot tubes. I would say nominally 0.176”. The LW tube is 0.1751-2 at the breech. There certainly could be 499 tubes + - 0.0005”from 0.176” I now have Diana springs in hand. I plan to try to stuff one in the 499b/LW. Best chrono # thus far is 552...

#16 drill rod is 0.177”. Often just under that. When I first started this adventure, I purchased a piece to poke through the shot tubes with a bit of valve grinding compound on it to attempt a bit of polish. If you have a tight spot, you could give that a try. Maybe even just use the end of a...

Should probably go through the pile of new 1938b shot tubes. Maybe one is 0.178. If there were 2, put one in a gun. Make a “sorter” to pretest if they go through.... I bet some of the old seamed tubes are big enough....

The seam problem is very real. Not only Cobalts shown problem, but also can be very out of round. On one order about a year ago, I odered several 1938b tubes, and 3 of them were seamed. Was s bit a argument with daisy, but they exchanged them. Maybe should have kept them for pure restoration...

That’s very interesting! Could put all the work finding a smaller tube to waste.... Will also be interested to know how round they are. I have found some match grade that are not very round. They will sometimes jam in the LW tube. Then you get them out and try a different rotation and they drop...

Cobalt has it correct. The custom air tube is also longer that stock. The combination of a closer fit inside the shot tube and the length minimizes air loss out the bb feed port and pressure loss back down the shot tube. I never got over 400 till we made the custom air tubes. To be clear, are...

Done it! It works really well. Only way to achieve 400+ mv in a 1938b. Must also use custom air tube. Used 1.5 tubes in one for Cobalt. He tested around 420 in his #1 repeater. Fair bit of machining involved!

Just got it together tonight. May have some time to practice this weekend.

One more

Not so much a $15.00 Daisy.... 499B/LW 16 shots Daisy Match Hi-540 Lo-530 Av-536 Es-10 Sd-2

Well... I just won a 1938 on eBay! So now will be able to work out some improvements. This is a project I’ve really wanted to do. Thanks Stork85 for inspiring me to move forward on this project! Stay tuned!

Mostly yes. Order the plunger assy. You will use the plunger head assy from it. You will use your original plunger tube. It catches the trigger sear differently than the 1938b. Then use whatever spring you choose. Drill the 1938b air tube. You should have some amount of improvement from that. A...

Well....doing a bit of struggling with the abutment seal. Apparently they are no longer available from daisy. I haven’t found any other sources either. So if yours is synthetic and still in good shape you can use it. There is a possibility of a leather replacement. I recall seeing some on the...

The mod25 shot tube doesn’t load using the loading port, so it can be left open, or make a plug. Not real hard but takes a bit of work if doing it without a lathe. Some dremel or die grinder work, etc.

Sorry, have been away today. Sorry don’t have all the answers you need at the moment. The abutment seal is a separate item. I’ll have to do some research for the part #. The 25 shot tube assy fits except it is about 1/8” long. I’ll include some pics of a mod25 shot tube assy in a 94. The 94...

No on the 880. I have one of the 20th Anniversary models, courtesy of Cobalt. The plan is to make a replacement smooth full length shot tube for bbs, using 2 499 shot tubes. It’s been on the back burner due to other projects. I do look forward to working on it. That a really different world than...

No preload. The new mod 25 shot tube is significantly better than the original. It’s a little longer, but a clever muzzle extension can be made using a short piece of 3/4” copper tubing an a 3/4” copper repair coupling. If you drill the original seamed air tube, 3/32” is the limit. If you get...