Author Topic: 1377 shooting 3/4" to the right (Read 1239 times))

Damo666 · « **on:** February 21, 2020, 07:19:54 AM »

I've got a Crosman 1377 here, but even if I move the rear windage either way by a couple of notches (lines) it always shoots around 3/4" to the right of my aim point.

I'm using the 6 o clock hold method.

Can anybody please advise what to do?

maraudinglizard · « **Reply #1 on:** February 21, 2020, 07:47:26 AM »

Are you one hand or 2 hand shooting the gun. Try resting it on a bag and see how that goes. Use the end of your index finger and pull the trigger straight back. To help get lined up, use your finger nail as a reference point, the right edge the trigger should line up with the cuticle edge of the fingernail. Don't laugh, it does make difference on how you pull the trigger and your grip on the gun. It takes a little practice be patient. Good Luck.

johnnyfoos · « **Reply #2 on:** February 21, 2020, 08:15:20 AM »

Sometimes when checking a gun to see if it is me or the gun-
I have a BIG vise with some "soft jaws",
that I put the gun into and fire it from there a few times to see where it hits
Then I move the sights or scopes POA to that POI.
Works great and the gun is done
now I just have to be

The Squeeze
NOT
the jerk
in the guns life.

PS: this also works great when dealing with women.

Just
sayn

Damo666 · « **Reply #3 on:** February 21, 2020, 08:18:56 AM »

Quote from: maraudinglizard on February 21, 2020, 07:47:26 AM

Are you one hand or 2 hand shooting the gun. Try resting it on a bag and see how that goes. Use the end of your index finger and pull the trigger straight back. To help get lined up, use your finger nail as a reference point, the right edge the trigger should line up with the cuticle edge of the fingernail. Don't laugh, it does make difference on how you pull the trigger and your grip on the gun. It takes a little practice be patient. Good Luck.

I'm doing 2 hand bag rested, & 1 hand - both methods always shooting around 3/4" to the right with nice grouping.

I've lightened the trigger & am proficient with a Springer managing 1/2" groups at 25+ yards, so it's not trigger problems.

I've also lightened the trigger pull on my 1377 by compressing the spring.

I'm just trying to establish how to get this thing to stop shooting 3/4" to the right consistently.

johnnyfoos · « **Reply #4 on:** February 21, 2020, 10:44:34 AM »

" to get this thing to stop shooting 3/4" to the right "

Well, maybe take a rubber mallet and smack the barrel a few times to the other side?

Yes
I have done this and it can work

just
sayn

$0.02

Hoosier Daddy · « **Reply #5 on:** February 21, 2020, 01:13:05 PM »

Original plastic breech or an upgrade steel one?
Is the barrel band the original plastic with front sight or upgraded.
You should be able to loosen the breech, gently move it to the left and snug it back down.
Or rotate the front sight / barrel band to move it to the right,

Damo666 · « **Reply #6 on:** February 21, 2020, 03:43:50 PM »

Quote from: Hoosier Daddy on February 21, 2020, 01:13:05 PM

Original plastic breech or an upgrade steel one?
Is the barrel band the original plastic with front sight or upgraded.
You should be able to loosen the breech, gently move it to the left and snug it back down.
Or rotate the front sight / barrel band to move it to the right,

This is new & stock, so has got the original plastic breech, front & rear sights, and barrel band.

Actually, looking through the rear sight, I notice that there's slight left slant on the front sight; would this cause the shots hitting slightly to the right as in my case, or would it cause them to hit left?

Also, to make the shots go left & actually hit the target - should I be moving the rear windage towards the purple arrow or orange one as per the image below.

I've also attached an image of the front sight with a slight left slant.

Hoosier Daddy · « **Reply #7 on:** February 21, 2020, 03:49:49 PM »

Yes, if your front sight is off to the left, your shots will hit right.

Rear sight, move left to change the POI (point of impact) to the left... (purple arrow)

Robert 5mm · « **Reply #8 on:** February 21, 2020, 04:09:56 PM »

Sight movement changes: Just to really confuse the heck out of some...

Move rear sight to the right to move your sighting point left to the POI.
Move rear sight to the left to move your sighting point right to the POI.
Move rear sight up to move your sighting point down to the POI.
Move rear sight down to move your sighting point up to the POI.

( your POI does not really change - the barrel shoots to a point - you move your sight to adjust to the point)

35 shooter · « **Reply #9 on:** February 21, 2020, 04:28:56 PM »

Quote from: Robert 5mm on February 21, 2020, 04:09:56 PM

Sight movement changes:

Move rear sight to the right to move your sighting point left to the POI.
Move rear sight to the left to move your sighting point right to the POI.
Move rear sight to the up to move your sighting point down to the POI.
Move rear sight to the down to move your sighting point up to the POI.

( your POI does not really change - the barrel shoots to a point - you move your sight to adjust to the point)

This is wrong! Move rear sight the way you want the poi to go. Left for left, right for right, up for up, down for down.

Damo666 · « **Reply #10 on:** February 21, 2020, 04:50:25 PM »

Many thanks for the replies, guys.

I'll move the rear windage in the direction of the purple arrow a bit more. I'm just a bit OCD and don't like having the windage set to an excessively noticeable angle.

So, there's a good chance that the slighty left slanted front sight is causing this to hit 3/4" to the right?

I might order a new barrel band in the hope this replacement is straight.

I wonder if I could use say an hair dryer on the foresight & manipulate it to move over to right to level it out? Anyone tried this?

Matchstickshooter · « **Reply #11 on:** February 21, 2020, 04:55:01 PM »

I have a 1322 that seem's to be the same way. Front sight is deformed, made crooked or drilled for the pin wrong.

May become a Carbine,and end the problem!

Hoosier Daddy · « **Reply #12 on:** February 21, 2020, 04:58:11 PM »

Quote from: Robert 5mm on February 21, 2020, 04:09:56 PM

Sight movement changes: Just to really confuse the heck out of some...

Move rear sight to the right to move your sighting point left to the POI.
Move rear sight to the left to move your sighting point right to the POI.
Move rear sight up to move your sighting point down to the POI.
Move rear sight down to move your sighting point up to the POI.

( your POI does not really change - the barrel shoots to a point - you move your sight to adjust to the point)

Robert: No wonder you aren't in the Off Season Target Matches...

Pay no attention to him Damion, that is incorrect information.

Tom Tucker · « **Reply #13 on:** February 21, 2020, 05:11:38 PM »

Quote from: Damo666 on February 21, 2020, 03:43:50 PM

Quote from: Hoosier Daddy on February 21, 2020, 01:13:05 PM
Original plastic breech or an upgrade steel one?
Is the barrel band the original plastic with front sight or upgraded.
You should be able to loosen the breech, gently move it to the left and snug it back down.
Or rotate the front sight / barrel band to move it to the right,

This is new & stock, so has got the original plastic breech, front & rear sights, and barrel band.

Actually, looking through the rear sight, I notice that there's slight left slant on the front sight; would this cause the shots hitting slightly to the right as in my case, or would it cause them to hit left?

Also, to make the shots go left & actually hit the target - should I be moving the rear windage towards the purple arrow or orange one as per the image below.

I've also attached an image of the front sight with a slight left slant.

Could be the picture, but the breech looks like it's canted a little to the right. I would remove the breech and then carefully reinstall it. Make sure the barrel, transfer port, and valve holes are perfectly aligned. You can reorient the valve in either direction with the tip of a plastic mechanical pencil or similar implement. If these things aren't straight, the plastic breech is more than willing to twist slightly. Don't crank down the rear breech screw too hard either, just enough to secure it. See how it shoots then. I've had plenty of the these guns which needed severe windage adjustment right out of the box, but which started shooting straight as soon as I took them apart and put them back together with some care and attention to detail

Robert 5mm · « **Reply #14 on:** February 21, 2020, 05:14:26 PM »

I understand how the process works - I just thought I would confuse you.
WHAT I SAID IS TRUE.

But the rule of thumb is to move your POI to right move rear sight to right - and so on.

BUT Your POI does not really move - your barrel shoots to a point - you do not move the barrel.

Hoosier Daddy · « **Reply #15 on:** February 21, 2020, 05:22:15 PM »

Quote from: Robert 5mm on February 21, 2020, 05:14:26 PM

I understand how the process works - I just thought I would confuse you.
WHAT I SAID IS TRUE.

But the rule of thumb is to move your POI to right move rear sight to right - and so on.

BUT Your POI does not really move - your barrel shoots to a point - you do not move the barrel.

Oh you DOG... read what he wrote guys. Our mind played tricks on us.
Key words are "to move your sighting point".... NOT the POI.
Sneaky... very sneaky. LOL

Damo666 · « **Reply #16 on:** February 22, 2020, 06:27:29 AM »

Cheers for the replies guys.

Would it be worthwhile trying to manipulate the front sight to the right to centre it up? If it's worthwhile, I'll try heating it up with an hair dryer & bending it over.

Could something as simple as this slight left cant cause grouping to be 3/4" to right?

Hoosier Daddy · « **Reply #17 on:** February 22, 2020, 08:04:25 AM »

Quite possible, what distance are you shooting?

Damo666 · « **Reply #18 on:** February 22, 2020, 10:21:42 AM »

Quote from: Hoosier Daddy on February 22, 2020, 08:04:25 AM

Quite possible, what distance are you shooting?

Hi Scott,

I'm only shooting 10 yards away.

Actually, I just followed instructions and slid the rear windage virtually all the way left (just 1 indicator line left) & it's now on target.

Before, I was attempting to turn the rear windage in a circular type motion as opposed to slide it across, and this is where I was going wrong.

Hope this makes sense.

Either way, it's now shooting perfectly on target with the elevation at the lowest level and windage virtually fully left with 1 marker line remaining.

I'm sure that if I moved the foresight left cant a little right, I'd move a marker or two over to the right virtually centralising windage..

It looks like my barrell isn't bent, and that was a major concern at one point.

Over here the 1377 costs £90 (circa $120) so having a Lemon is more of an headache than you lucky guys who only pay around $40 for one.

I've attached a screenshot of where the windage marker is now set at: it's between the last & 2nd line.

As always, I'm really grateful for all your help.

Hoosier Daddy · « **Reply #19 on:** February 22, 2020, 11:29:21 AM »

OUTSTANDING DAMIAN!
Glad you got it sorted out.
That is not an extreme amount of adjustment, very typical actually with the factory tolerances.

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1377 shooting 3/4" to the right

Author Topic: 1377 shooting 3/4" to the right (Read 1239 times))