I've never had a problem removing the barrel.... snug fit, but just a pull and a twist.... Once it's out, you'll find the port is in the same place as the modern barrels, it just doesn't have the 0.200" counterdrill for the transfer port recess....
Bob
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count!
Great that you got the FTP working.... Does your 140 have a sleeve inside the valve to reduce the volume?.... If so, take it out.... You will make the gun easier to pump, with a lighter trigger pull, and the velocity will continue to build more past 5-6 pumps.... Typical numbers for the ones I did are.... 515 at 5 pumps, 610 at 8 pumps, and 660 at 10 pumps.... the strongest one topped 700 at 10 pumps, but had a bored valve.... Some other things you can try....
Drill out the flow-through bolt to 5/32" front and bottom....
Drill out the end of the valve (the part the quad seal slides over) to 5/32".... using numbered drills, ONE SIZE AT A TIME.... go slow so you don't expand the outer surface....
You have already fitted a poly-port, but make sure the barrel port is also drilled to 5/32" (again, one size at a time, making sure the drill doesn't grab and damage the opposite side of the rifling).... Carefully deburr the inside of the port to make sure it doesn't damage the pellet on loading....
The extra volume inside the valve by removing the sleeve reduces the pressure at a given number of pumps, which reduces the trigger pull.... The velocity is unaffected at about 5-6 pumps, tends to be better above that, but slightly slower at 2-4 pumps....
Bob
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count!
Hum well sound like your on the right track .Here a pic of the last few pumpers i worked on
Lauchlin posted pumper eye candy again
Must be a lot of fun shooting those, if my little 140 is any sort of a measuring stick.
The gun is hitting hard now. It still has some issues. I think I'm going to quit fooling around with the poly tube, and order in a proper 22-XX metal tube and seal for it, and be done with it.
I pinched my hand in between the stock, and pump handle on Wed. night. I got a pretty fair blood blister in the palm of my hand, but worse, the pump handle wood chipped away at the pinch zone.
The damage is not as deep as it looks in the photo. I think the camera sets to f-4 automatically on close-up mode. I should be able to fill and sand that in, with it not showing too much. Needless to say, the wood is incredibly dry. I think a strip and refinish with quality wood oil is definitely going to be needed.
There isn't much point in me benching this little gem- my eyes just aren't up to it. Here's next best- off-hand kneeling at 7 meters...
It seems to like the daisy h.p.'s. 3 went into pretty tight, and the other 2 are geezer eyes...
As for power:
All 5 of the h.p.'s went through both the bottom and lid of this fairly hard salmon can at 12 Meters- 7 pumps. If I can get within 10-12 meters of a grouse with this thing, it's dinner time!
I'd like to replace the sear block spring again, with something a bit stiffer. The replacement I used bunches up a bit more than it should. I think I should try a section of 13-XX hammer spring in there- should be about right tension wise. I also want to replace that quad seal...
The bbl on this is only 20.5 inches long. I'm a bit taken a-back at the velocities I've been wringing out of it. Weight is just right for hurried off-hand snap shootin at those trophy food tins. I'm falling hard for this 140, and am not too sure I want to put it down any time soon. They say you can't go back to your childhood, but what the heck do "they" know?
As for porting/tuning/souping up goes.... I haven't decided yet. I have a few more projects that are a bit better suited to handling power, but you never know...
Pump resistance starts getting heavy at 5 pumps, and I've never seen anything like this in my 13-XX's. Like I say, I'm reserving that decision on power, for the time being....
Regards,
Doc Sharptail
"Ain't No Half Way"
-S.R.V.
Like I said, if it has that sleeve inside the valve, pull it out and try it.... you can always put it back if you want.... I've found it increases the velocity over 6 pumps, makes it easier to pump, and reduces the trigger pull weight.... Where is the negative in that?....
Bob
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count!
Actually, none, and noneOriginally Posted by rsterne
There's no sleeve in the valve, which I should have mentioned last night...
I'm pretty sure I'm losing velocity in 2 places- that ill-fitting poly transfer tube, and either the quad seal, or sear block spring.
I did pump it up to 15 pumps, just once, to see what it would do, and it gave me 620. Pump tension gets really heavy after 6 pumps, and that fifteen pumps is a lot of grunt work. I don't think I'll be doing that often...
I'm hoping the hill pump I have in mind for the QB-D is not as hard to pump as that- I'll be in trouble if it is...
Regards,
Doc Sharptail
"Ain't No Half Way"
-S.R.V.
Went to a small, extremely crowded gun show on Saturday. I picked up a set of the intermounts for the 140, just to see what it would do.
That's a well-travelled 4-12X 40mm Banner.
Group at right shows how the 140 reacts to the jsb 15.9 gr straton points. 5 pumps per shot at 12 M , rested under the fore-arm. 5 Shots. Gun has issues with bbl play at the bbl band/pivot block. Nothing really new, or insurmountable there.
It looks a bit funny with the big modern scope on it. I'll try with either a 3/4" steel tube Weaver B-4, or an older Banner fixed 4X rimfire scope...
It looks like this bbl's a good one, from what I can see of how it wants to put holes together at bottom left and right...
Regards,
Doc Sharptail
"Ain't No Half Way"
-S.R.V.
I did some more with the 140 tonight. I robbed a transfer port out of one of the modern pumpers.
The bottom of the breech needs to be relieved. It holds well, though.
Velocity improved markedly:
3 pumps- 384.2 fps
5 pumps- 478.0 fps
7 pumps-551.0 fps
10 pumps-628.4 fps.
15 pumps- 677.3 fps
I'm pleased with that performance- it's amazing what this old gal will do.
I pinched my hand in the gap between the pump handle and stock again, but didn't lose any wood this time.
Does anyone here have a photo of what an original 140 transfer port looks like? It may help a lot. I can't leave that over-sized port in there for very long- I'm worried about warping the bottom of the breech. There isn't a lot of steel there.... If I can avoid cutting into the bottom of the breech, I'd be a lot happier.
Regards,
Doc Sharptail
"Ain't No Half Way"
-S.R.V.
I've got it nearly to my liking now. I had to put the bbl into a padded vise to get the breech off. One twist with a drift in the rear screw hole, and it slid off easily. It was nice to be able to see the deep jet black lustre blue that "Power Without Powder" was using in those halcyon days, in the protected area behind the breech opening. The rest of it's plum brown, in comparison...
I couldn't set up in the drill press. There isn't a suitable press vise there for something as small as that 140 breech. I tried laying the breech on top of one of the vise rails for some semblance of level, but couldn't get it. A vise for round stock just got added to my list. I did it all by hand on the top of the work bench. The steel on the breech is very hard- it almost looks like case knit coloring on the bottom of the breech. The bbl steel was kind of hard to work with- porous and crumbly. It wanted to tear under the bit, rather than cut. I had to take it very slow and gentle.
Couldn't come up with a 0.20" drill. Two closest were .196" , and .205" I made do with the .196" The bottom of the breech sits almost flush with the compression tube, and there's no leaks.
I sat down with it to group:
That's 6 of the Daisy 14.3 gr h.p.'s at 12 meters, 6 X on the 4-12 Banner. 5 pumps each shot. I have no explanation for that flier at top- it was shot #4. I certainly didn't yank it.
For a 50 year old bbl, that ain't bad at all. I now have to determine which pellets this gun likes....
That's 17 of the Daisy pellets at 12 meters. I was varying the pumps, and also shooting as fast as I could from a rest under the fore-arm. Lowest number of pumps was 3, and the highest was 10. The only pellet not to make it through both sides of the tin was the 3 pump shot....
Not bad at all, considering how that "tin" metal hardens up once it's been penetrated...
That's good news on the modern bbl hole lining up- filed away for future reference, just in case...
Regards,
Doc Sharptail
"Ain't No Half Way"
-S.R.V.
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