My first B1 rifle - the darn thing works!
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My first B1 rifle - the darn thing works!
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Topic: My first B1 rifle - the darn thing works! (Read 1346 times))
gloob
Marksman
Posts: 485
yes
Real Name: Ken
Re: My first B1 rifle - the darn thing works!
«
Reply #20 on:
July 06, 2022, 02:11:05 PM »
The bigger problem with mine was the cocking arm slipping by the piston. After adding the button to the piston, it worked again. For another thousand shots before binding and slipping, again.
The little "Y" end of the cocking arm was nearly gone. It has been wedging itself between the cylinder and piston, lapping itself away into nothing. The little metal that was left folded and tore while getting the cocking arm out.
I ground the "Y" off, entirely, and built it back up with about 5-6 rounds of tack-welding and grinding. Surprise of all surprises is that it fit back in and is working on the first try, without any fitting or fettling. Just grinding by eye, what it should look like.
I still want to add a scope stop. The scope is holding zero for the last thousand shots. Except for sliding back on the rail, once or twice.
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AZ, Phoenix
Toxylon
Expert
Posts: 1718
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Real Name: Duke
Re: My first B1 rifle - the darn thing works!
«
Reply #21 on:
July 08, 2022, 04:54:03 AM »
Ken,
You have the patience of a saint
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gloob
Marksman
Posts: 485
yes
Real Name: Ken
Re: My first B1 rifle - the darn thing works!
«
Reply #22 on:
July 09, 2022, 01:50:25 AM »
That's one of the reasons I bought this rifle, though. I kinda like to tinker with things. There's plenty of swearing involved, but it keeps me busy.
But man, the timing of your post! Just earlier in the week, this rifle started getting sticky and started slam-firing, again!
So here's the latest. I found there was a lot of galling where I added the weld-on button. I couldn't even immediately get the piston back out, because of little BB's of steel on the surface of the cylinder. The weld button was pretty much completely gone. AND the heat-affected original piston material also showed plenty of galling. Now, I never lubed it. And even when the cocking got crunchy, I just added more muscle for another several hundred shots until it started to malfunction.
I sanded out the cylinder and piston. I soldered a strip of brass over the galled up spot on the skirt, figuring brass is probably better than 6013 when it comes to galling. And after the mailman delivered my moly lube, I put it back together. Cocking was smooth as silk, now. But it was still slam-firing! I soldered another strip of brass over the first one, and now it required sanding before it would just barely fit back in. Still slam-firing!
I considered ordering another B1 for new parts to try the ole mix and match. But even though it's only 60 bucks, I'd have almost a complete other rifle just sitting around or ending up in the dump. So I tried one last thing.
I chucked the piston rod in a sturdy metal vice with the hook just sticking out. And slammed it with a sledge hammer to see if I could bend it to make the hook more hooked. After 6 or 7 blows, I couldn't see/measure any bending, but I tried it, and it improved! So I went at it again, with earnest. After a minute or so of pounding, I could see a visible bend! It still slid through the spring guide, but I ground it a little and sanded the burs left from the vice, to be sure. And it seems to be back in business!
I also cut 3 1/2 coils off the spring, to remove about half the preload. Seems to be shooting just as hard and accurate, but with slightly easier cocking, way easier reassembly, and way nicer shot cycle. The moly lube really helped. I'm about to moly lube all my rifles now! While waiting for the moly lube, I also got around to making and installing that scope stop!
«
Last Edit: July 09, 2022, 02:04:19 AM by gloob
»
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AZ, Phoenix
gloob
Marksman
Posts: 485
yes
Real Name: Ken
Re: My first B1 rifle - the darn thing works!
«
Reply #23 on:
July 10, 2022, 05:24:05 PM »
Another thing I accidentally discovered while trying to fix the trigger is the effect of a stronger trigger spring. I think the trigger spring on this rifle is "too light." This contributed to the feeling of overtravel, as the trigger flies back after breaking.
Adding a stiffer trigger spring makes this feeling of overtravel go away. It also changes the feeling when you cock the rifle. Instead of a cheap "click!" it's more of a expensive "snick!"
Favorite rifle, now, for sure. The trigger break weight isn't completely consistent; varies from about 2-3.5 lbs. But the feel and shootability is excellent. Besides the trigger, the rifle has a great overall size/weight, balance, and feel.
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AZ, Phoenix
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My first B1 rifle - the darn thing works!