POI shift

[tinbender]

Well, I won't bother writing about the work on the Discovery Receiver as someone decided it was taking to long perhaps and headed me off at the pass :) Saved me allot of typing to....thanks!

Odd thing though, out of the box it shot 4.5" low. Shimmed the optically centered 6x scope and after the work on the receiver it shoots 4.5" high? no changes to scope or mount. Noticed the barrel was not very straight and resisted the urge to get out the V blocks and dial indicater. Will later but don't want to change to many things at once.

I don't like the barrel to receiver fit. Am thinking of reaming the breech, turning the breech end of the barrel down for a press fit bushing and pressing into the receiver. Who knows.... might be the next post I read:)

Tinbendin'Dave

[tinbender]

I think it is a very sloppy fit  Paul,

Perhaps to much room for error in assembly. Accuracy is about removing variables including barrel/receiver fit. I believe others have mentioned more rigid assemblies on higher $  guns. Just one mans opinion :)

Dave

[tinbender]

Neither Paul,

Like the other 22xx family guns the barrel is a very loose slip fit in the receiver that is secured with an allen screw. Allot of people have added a second set screw and are happy with it. This assembly has come up often in regard to free floating the barrel. I should say that I've spent quite a bit of time searching sites to see what folks are doing with these guns. Have not found much. Don't think I will post any how-to stuff as it has been pointed out that I don't have the Internet skills for this:) No flame intended as my first thought in the morning is not to take myself to seriously:)

Tinbedin' Dave

[melloroadman]

May be who ever pointed that out would be a team player and help you acquire the skills you need . A few pictures and lessons on how to post them and I think your in . The team here can help you through the posting process I believe . We have done it before .Marvin

[tinbender]

That has been done Marvin, and a good job it truly is :)

In time my cornputer skills should improve. In the meantime I'm having a ball in the shop with my toys. And that is where this all started, for me at least.

Tinbendin' Dave

[tinbender]

Does the idea sound feasible to you Paul?

I have done some press fit on equipment assemblies in the past. I don't claim to be a machinist but a clever fellow might see this as a simple way to get a rigid assembly. Ream the receiver to get a good bore, spin a press fit bushing into the receiver bore, cut the breech end of the barrel to a press fit to the I.D. of the bushing.

Dave:)

[melloroadman]

Another approach might be to silver solder the assembly you have now . I know Crosman made it easy and in expensive to change barrel calibers this way and I have had no problems with mine. Although I have heard that the transfer port tube has been a little long on some guns causing a teter todering of the barrel . Timmy told me he just placed a clamp on his breach and then tightened it down and eliminated the problem . Others have filed the tube to remove material as well .Marvin

[tinbender]

Question Paul,

Can the receiver bore be sized larger and the barrel turned smaller to add some meat to the bushing?

[tinbender]

No Marvin,

 I did not think of silver soldering but that would be easy to do. Did think about Epoxy as some of the crosman people have done this with JB weld. I know from messing with sailboats that an epoxied fitting can be disassembled with a relatively low heat applied so it doesn't have to be forever.

Don't know how much temp. Parkerizing can take and decided before I got the gun this was going to be the finish.

Certainly don't want to overly complicate:)

[tinbender]

Disregard paul you already answered my question thanks :)

[tinbender]

Sorry Paul,

I must be getting tired:) Not quite understanding your last post. As I told Marvin perhaps I'm making this more complicated than it needs to be? A rigid assembly is the goal and there is plenty of silver solder and epoxy in the shop.........and OEM barrels are cheap. An LW perhaps, they are good enough for the 22xx crowd :)

Dave

[melloroadman]

Right now you have one set screw holding the barrel in the barrel band coming in from the top . If you were to but one on each side of the barrel as well making a total of 3 screws that in its self might be enough pressure to keep the barrel in place  I am speacking about the band that enters the breach ,Marvin

[tinbender]

Thanks for thinking it through with me fellas,

I think for now will add set screws and see how that turns out. Really wasn't kidding about the lother/walther barrel. The platform is worthy IMHO.

Dave

[melloroadman]

I have been told that there is not really any difference in accuracy from several people. I might be wrong and you might talk to Roy at Mountain air but I believe he does not really see a gain in them. Buuuuuuuuuuuuuuuuuuuut this free floating barrel thing has me interested in the results since every one else is adding barrel bands to help their accuracy which I have not had to do but then again mine is a .177 and that little thickness difference in the barrel might be why . Let us know the results . Marvin

[tinbender]

Hey Marvin,

I can tell you what this man thinks:)

The toothpick as it has been called from crosman/benjamin is not well suited to free floating. It is not a rigid barrel/receiver and as such probably benefits from the added rigidity of a barrel band or two. Some have experimented with additional bands or free floating the barrel, however I do not think the rigidity of the design lends it's self to either. My thought is to go beyond what the designers had in mind and mod a simple rigid fix that would lend it's self well to band supported barrels and better to free floated or friction band design. Just talk until someone tries it.

Thanks for the chat, going to Maine now and then have some gun work to do

Dave