What should I do with this? Sheridan still way, way off!

[Big Rick]

We are discussing the same Blue Streak from the failed weld thread. I spent the money to get a scope on this 1990`s gun that I bought new but have never been able to use. Actually I had two different scopes that both did the same thing, which it has done since new. It shoots low. At ten yards it is six inches low! The scopes were both maxed out and I still could`nt get it on paper. Could something like this be a crowning issue? It has plenty of power (normally six pumps).

There is a flat spot on the end of the barrel (outside edge) almost like it was dropped on end. This would have had to happen before purchase. I have never had a gun act like this and can`t imagine what to do with it.

[Trim Tab]

Good afternoon,

Might I suggest switching the scope rings position front to back and back to front and see if that gets you anywhere, or even use a shim on the back?  Is the pellet too heavy? do you see the pellet drop?

[Big Rick]

I thought about switching the rings around but they look the same to me. I did not shim the rear but can give that a try.

The pellets are Sheridan trash cans (classic shape, yellow box) and no I can not see them in flight.

[Trim Tab]

One more thought, maybe 6 pumps is not enough power for the pellets?

[Roadworthy]

I know nothing about the gun, but here is some food for thought:

Where on the barrel is the flat spot - top, bottom, side?  If it's on the top, could the barrel have been bent down?  Have you considered bending the barrel?

Is the scope mount on the barrel itself or back on the receiver?

Is this the type gun where you can loosen and rotate the barrel?  What happens if you rotate the barrel, say 180 degrees?  Does it then shoot high?

[Habanero69er]

It's a Blue Streak, so I doubt you can rotate the barrel.

[north country gal]

What scopes and rings? Any way to go with lower rings? These pumpers weren't designed for scope use, so when adding a scope mount, you're already putting that scope way above the bore for the sake of access to load. I'd try to go with the lowest possible rings or change to a scope with more adjustment range.

[Martis 1]

Please do try moving the rings around.  I did that with my 392 and it made a huge difference.  I know they look the same, but it takes very little variance to change your point of impact substantially.  As an example, when I initially mounted mine, I was off a good 15" at 18 yards.  Switching front and back, and rotating one around, brought me within 2" of zero.
Ron.

[Habanero69er]

If swapping rings doesn't improve your problem, try shimming the rear ring.

[bantam5s]

If it's a 90's ( .20can Benjamin with the Sheridan name slapped onto the side )and has this bad of a problem, I would just sell it for parts and use the money twards an actual ( Racine wis made ) Sheridan blue streak because it'll be a much better nicer looking gun.

[Big Rick]

The only marks on the gun: Sheridan Products Inc., "C" series, a serial number- 32848.

The barrel is welded it`s full length so no bending that.

Looking strait down the barrel the flat spot is from 12 o`clock to 2 o`clock on the outside of the muzzle with no apparent interference with the actual bore.

[oldnamvet]

Since the dent/flat spot is mainly on the top of the barrel, that might cause the pellet to deflect low.  A very slight bit of bulge, not even enough to see, could result in a barrel slightly out of round just at the muzzle.  I would recrown the barrel.  Trying to bend it would most likely ruin it and break the barrel loose.

[bantam5s]

The only marks on the gun: Sheridan Products Inc., "C" series, a serial number- 32848.

The barrel is welded it`s full length so no bending that.

Looking strait down the barrel the flat spot is from 12 o`clock to 2 o`clock on the outside of the muzzle with no apparent interference with the actual bore.

hmmmm! I don't know what the transitional guns had marked on the, so does yours have a rocker safety? If so then it's a real Sheridan  from '89 or '90 at the latest and you should ( if cost permits ) have a different barrel soldered on ( if you can get ahold of one, or have the original barrel soldered back on after having the damaged section cut off )  it may look a little weird, but at least it'll work properly.

[Martis 1]

Aside from shooting very low, how does it group?  If it groups well, there are easy fixes to bring the poi back up.  Shimming the scope within the rings is a good option since the gun doesn't recoil, so little chance of damaging the scope.  I found a tutorial online that allowed me to fix this problem in one of my guns using epoxy and a plastic shim cut from a milk jug.  I pretty much "bedded in" enough angle to bring the scope back to zero and it worked really well. 

[19Sheridan57]

If swapping rings doesn't improve your problem, try shimming the rear ring.

+ 1 .
   Not unusual at all to have to shim up the rear . Start with one piece of electric tape & go from there. My scoped  '57 Sheridan is shimmed , too.

[jward681]

My address is......lol


Shimming is going to be the easiest and cheapest attempt at correcting the issue. If that doesn't work you may consider calling Tim at MAC1 Airguns for help/guidance as he's a guru of these great rifles.

Best of luck....but seriously my address is......

[Big Rick]

It does have a rocker safety but does not have Racine, WI stamped on it, just Sheridan Products.

 It does group low and to the right.

I have to order another set of rings because the first ones are now on another gun. When those come in I`ll shim the rear to see if that does the trick and let everyone know. Thank you for the suggestions.

[cwlongshot]

If dents are right at muzzle, the barrel can be shortened and re crowned easy enough....

CW

[longhunter]

If dents are right at muzzle, the barrel can be shortened and re crowned easy enough....

CW

I still have nightmares about the other dan that happened to. If the op is going that route, send it to mac1, and have it done professionally.

[Big Rick]

 Before I tried something like that I would take a file to the front sight and silicone the rear dovetail back on. If this gun was my first love I would spare no expense but it was purchased to replace my first Sheridan, which I had as a youngster back in the mid 1970`s.
Unfortunately the budget wont alloy for any more spending on this project for a while. My first priority in getting my Nitro Venom Dusk shooting straight.