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 Beeman RX2 in .20 cal help 
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NeuWOCer

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Unread post Beeman RX2 in .20 cal help
Bought myself a new, but used, RX2 HW90 and took it to the range to see what it would do. I tried two different scopes with two different sets of rings. It shot so low that I could not sight it in. Took a couple shots with open sights and did not to bad.

I want to scope this gun, so open sights are out. Putting pellets into the breech took a little pushing to get the pellet into the barrel. Breach seal seems a little proud. Thought it could have something to do with the droop.

So today I discovered that there doesn't seem to be a true lock up closing the barrel.

It seems as though there is a bit of movement in the lock up. So, when the barrel is closed, lock up should be solid, locked and take some force to crack the barrel.

On mine, with the barrel closed, I can push the barrel, with a little effort, then it seems to hit a lock point.

If this is happening, gun loaded, barrel locked to closed position, then fire, will the barrel move to the position it moved to with a little force as I described earlier? Could this be happening causing a low POI?

If so, who can walk me trough the sets to figure it out and fix it?

If my assumption is correct, I may not have barrel droop but a moving barrel. Visually, I don't see any droop.


Wed Dec 26, 2012 7:11 pm
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NeuWOCer

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Unread post Re: Beeman RX2 in .20 cal help
Ok, it does lock up properly but I have noticed plenty of barrel droop or it's bent. I'll update later.


Wed Dec 26, 2012 10:03 pm
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UnterWOCer
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Unread post Re: Beeman RX2 in .20 cal help
Gasram is not pumped? What velocity?

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Thu Dec 27, 2012 12:33 am
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NeuWOCer

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Unread post Re: Beeman RX2 in .20 cal help
Good point, I'll have to chrony it.

I'm surprised feed back is so slow here, must be the holidays?


Fri Dec 28, 2012 6:15 am
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UnterWOCer
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Unread post Re: Beeman RX2 in .20 cal help
Here so always.

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IZH-38 .177
IZH-67 .177


Fri Dec 28, 2012 11:08 am
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NeuWOCer

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Unread post Re: Beeman RX2 in .20 cal help
Update
Here is a email I've sent to two friends who are more than qualified to tackle this problem. Many on this form, like C.A.P, and Thomas gave good advice on what to do and some said get a droop compensating mount. Well, looks like a mount would have masked the problem till it got worse.
I am hoping to have it back by next weekend.

Email:
Looks like we are dealing with a few problems at the same time.

1, the pivot bolt
2. pivot breech hole
3. bent barrel, more than one bend?
4. breech seal too proud?

1. Walter noticed that the hole for the bolt that goes through the block, has a shoulder or sleeve in it. It appears that this smaller portion rides on the collared portion of the pivot bolt. You'll notice the pivot bolt is not collared all the way to the threads on the receiver. Design flaw?
I think this is where we get some play when the barrel is in the receiver hence the unusual wear on the bolt.

2. Breech hole collared or sleeved probably to prevent the threads of the bolt from getting damaged.

3. Had the barrel in the lathe from breech to muzzle and you could see the bend easily (showed Walt on phone camera).
We slid the barrel all the way into the chuck so that only the breech block stuck out and spun it. There was visual wobble.
This is the point where my friend began to straighten the barrel. He put a dowel into the loading port to measure the run out while spinning.
Thats as far as he got. Went for lunch.

3. Walt thinks that the barrel may have more than one bend.

4. Breech seal protrusion measured .020. It may or may not have been shimmed. The detent and spring may need a clean and lube. Was not having positive lock up when I first got it. I then took it apart and removed the cocking linkage, then got positive lock up. So, it may have something to do with the linkage.
The breech shims are a little chewed up too. One looked like it was pealing, like the threads when your machining stuff.


Sat Dec 29, 2012 3:54 pm
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