Reply
 
Thread Tools
Old 06-05-2009, 07:22 PM   #1
Firearm Aficionado
 
Join Date: Apr 2009
Location: Indiana
Posts: 579
side mount

i just got my mosin back from the gunsmith. I was getting it outfitted with a sidemount and rail from kalinka optics. the mount is way off set to the left and i have two questions about it. 1) Will this affect the zero as i get into longer ranges since the scope wont be directly above the barrel? Like if i go from 200 to 500 yards will the shots hit farther left or right because of this mis-allignment of the barrel and scope? 2) Are there cheek pieces made that i can just strap onto my stock so that my eye will line up with the off set scope? If not, what would you guys suggest i do to line my eye up?
rifleman14 is offline   Reply With Quote
Old 06-05-2009, 07:54 PM   #2
Banned
 
Join Date: Nov 2007
Location: Farmington Hills, Michigan
Posts: 458
You need to zero it in such a way that POI and POA are
offset in the same manner as your scope is offset (horizontally) relative to the bore. I bet it's just 1/4"-1/2" only, which falls within typical spread of most ammo. If it is more that that, you either used a wrong mount or your gunsmith had no idea what he was doing.
kortik is offline   Reply With Quote
Old 06-05-2009, 08:02 PM   #3
Firearm Aficionado
 
Join Date: Apr 2009
Location: Indiana
Posts: 579
Quote:       Originally Posted by kortik View Post
You need to zero it in such a way that POI and POA are
offset in the same manner as your scope is offset (horizontally) relative to the bore. I bet it's just 1/4"-1/2" only, which falls within typical spread of most ammo. If it is more that that, you either used a wrong mount or your gunsmith had no idea what he was doing.
i can probalby get a picture on later tonight
rifleman14 is offline   Reply With Quote
Old 06-05-2009, 08:15 PM   #4
Firearm Zealot
 
PSLMAN's Avatar
 
Join Date: May 2008
Location: Rheas Mill, Arkansas.
Posts: 5,145
Quote:       Originally Posted by rifleman14 View Post
i can probalby get a picture on later tonight
Please do! I want so badly to scope my 91/30 and even though I most likely won't use a side mount I'd still like to see yours.
__________________
Zombies tremble at the mention of my name.
PSLMAN is offline   Reply With Quote
Old 06-05-2009, 08:24 PM   #5
Firearm Zealot
 
jmp8927's Avatar
 
Join Date: Nov 2007
Location: Walterboro, SC
Posts: 4,002
No, the Kalinka mount sites off to the left. One reason I'm not using their Mosin Nagant mount. If I put a side rail mount on mine, it will be a low profile AK47 mount that should sit on center.
__________________
Red Patcher
USMCR
jmp8927 is offline   Reply With Quote
Old 06-05-2009, 09:05 PM   #6
Firearm Aficionado
 
Join Date: Apr 2009
Location: Indiana
Posts: 579
wish i would have known that before i bought it
oh well i can deal with it
i just need to know the answers to my questions and will be good to go
rifleman14 is offline   Reply With Quote
Old 06-05-2009, 11:03 PM   #7
Firearm Aficionado
 
Join Date: Apr 2009
Location: Indiana
Posts: 579
As you can see the scope and mount are off set to the left. will this affect the zero at greater distances as i said in my first post?
Attached Thumbnails
side mount-06-05-09a.jpg   side mount-06-05-09b.jpg   side mount-06-05-09c.jpg   side mount-06-05-09d.jpg  
rifleman14 is offline   Reply With Quote
Old 06-05-2009, 11:05 PM   #8
Firearm Aficionado
 
Join Date: Apr 2009
Location: Indiana
Posts: 579
if you look closely youll notice that i completely redid and refinished the stock. It really is a beautiful stain and look for the mosin
rifleman14 is offline   Reply With Quote
Old 06-05-2009, 11:11 PM   #9
Firearm Enthusiast
 
Madcat455's Avatar
 
Join Date: Apr 2009
Posts: 213
I don't know about Kalinka... but even the standard PU mount sits left of the bore. Yes it'll cause the POI to drift if you zero it at a certain distance.

I'm actually trying to Fab up a mount, using a cut PU bracket. Going to use a Weaver rail welded on sideways.. that'll allow the scope to sit directly above the bore.

EDIT: That's A LOT further left than a standard PU. wow.
Madcat455 is offline   Reply With Quote
Old 06-05-2009, 11:11 PM   #10
Firearm Zealot
 
PSLMAN's Avatar
 
Join Date: May 2008
Location: Rheas Mill, Arkansas.
Posts: 5,145
Good looking setup you have there. I'm sure the offset mount will affect the zero to some extent but I don't know how much, probably the best way to find out is to shoot it.

The original scope on my PSL was offset like that but I swapped it out for a center mounted scope.
__________________
Zombies tremble at the mention of my name.
PSLMAN is offline   Reply With Quote
Old 06-05-2009, 11:14 PM   #11
Firearm Aficionado
 
at4rxj's Avatar
 
Join Date: Oct 2005
Location: Houston, TX
Posts: 1,154
Mine sits over the center pretty well.



__________________
modulARweapons.com
at4rxj is offline   Reply With Quote
Old 06-05-2009, 11:24 PM   #12
Scope mount mfgr.
 
jmeck's Avatar
 
Join Date: Apr 2008
Location: NC
Posts: 1,606
Rifleman14, I have a Swiss K31 with the scope offset to the right, I zeroed
it at 100 yards. I then shot it at 200 yards ,and I didn't make any adjustments to the windage setting, It still shot true. It may not make as much of a difference as you think it will. If the scopering assy is made out of steel you could heat it up and bend closer to center,I would'nt move it to much though because your bolt doesn't have a real tight radius and may hit the mount. Good looking rifle I like it!
__________________
Everybody's weird, they just hang out with like minded people to feel normal.
jmeck is offline   Reply With Quote
Old 06-05-2009, 11:42 PM   #13
Firearm Zealot
 
jmp8927's Avatar
 
Join Date: Nov 2007
Location: Walterboro, SC
Posts: 4,002
You may try this mount. I'm pretty sure it will work on your rail and it will move the scope very very close to center.

http://www.kalinkaoptics.com/detail.aspx?ID=489
__________________
Red Patcher
USMCR
jmp8927 is offline   Reply With Quote
Old 06-05-2009, 11:58 PM   #14
Firearm Aficionado
 
Join Date: Apr 2009
Location: Indiana
Posts: 579
Quote:       Originally Posted by jmp8927 View Post
You may try this mount. I'm pretty sure it will work on your rail and it will move the scope very very close to center.

EST SVD, SKS, TIGR Side Mount w/ 1" Rings - Kalinka Optics WarehouseŽ
that mount will except my rail. the one in the suggested products list is the one i have. if this mount is gonna do what i think it will with the windage being messed up at farther ranges then I'll try that one. I cant shoot until monday though because my neighbors have a mother in law over and her and her dog are sensitive to gun shots. I'll get a range report up monday though. If it will make a difference what do you guys think it will be? an inch or a foot or what?

Also, I've been tryin to get into stock work and would like to advertise. So if anyone wants a stock job on their wood stock rifle id be glad to help out. Maybe $40 or $50 if that sounds good.
rifleman14 is offline   Reply With Quote
Old 06-06-2009, 10:49 AM   #15
Firearm Zealot
 
jmp8927's Avatar
 
Join Date: Nov 2007
Location: Walterboro, SC
Posts: 4,002
Well is it's 1 inch off center from the bore now and it's sighted in at 100 yards, it makes sense that poi would be 1 inch to the right at 200 yards.
__________________
Red Patcher
USMCR
jmp8927 is offline   Reply With Quote
Old 06-06-2009, 11:03 AM   #16
Firearm Aficionado
 
Join Date: Apr 2009
Location: Indiana
Posts: 579
Quote:       Originally Posted by jmp8927 View Post
Well is it's 1 inch off center from the bore now and it's sighted in at 100 yards, it makes sense that poi would be 1 inch to the right at 200 yards.
or maybe 2 inches off at 200 and 5 inches off at 500..you know the whole concept of moa. however its not dealing with clicks, its an offset. i guess i just have to shoot it and find out
rifleman14 is offline   Reply With Quote
Old 06-06-2009, 11:52 AM   #17
Firearm Enthusiast
 
Madcat455's Avatar
 
Join Date: Apr 2009
Posts: 213
Quote:       Originally Posted by rifleman14 View Post
or maybe 2 inches off at 200 and 5 inches off at 500..you know the whole concept of moa. however its not dealing with clicks, its an offset. i guess i just have to shoot it and find out

It'd be interesting to know how it plays out in reality.

Personally, I think it's not going to be a "set" error.. but an exponential one. IE: a "set" error would drift the grouping left 1in @200, 2 in @ 300, etc. (if zero'd at 100). BUT, exponentially would be worse.. since it's off at the barrel.. It'd be 1in @200, 2in @ 300, 4in @ 400, 16in @ 500, and so on. (only using 1in strictly for the sake of easy math..LOL)

Should get a pool going zero it at 100.. then place bets as to how far over a 5 shot group moves at 500...LOL.

Last edited by Madcat455; 06-06-2009 at 12:11 PM.
Madcat455 is offline   Reply With Quote
Old 06-06-2009, 12:32 PM   #18
Firearm Aficionado
 
at4rxj's Avatar
 
Join Date: Oct 2005
Location: Houston, TX
Posts: 1,154
well, assuming the angles are true, 1" offset mount zeroed at 100yds should be off that same inch at 200 yds, 2 inches at 300 yds, 4 @ 400, 8 @ 500....

Think of two straight lines intersecting.

If you're going to do most of your shooting at 100, leave it zeroed there. The other option would be to zero it at like 500 (or another "long" range), and between 100 and 500 you'd be off by an inch or less. However, good luck getting that kind of accurate zero at 500.
__________________
modulARweapons.com
at4rxj is offline   Reply With Quote
Old 06-06-2009, 12:57 PM   #19
Firearm Aficionado
 
Join Date: Apr 2009
Location: Indiana
Posts: 579
Quote:       Originally Posted by at4rxj View Post
well, assuming the angles are true, 1" offset mount zeroed at 100yds should be off that same inch at 200 yds, 2 inches at 300 yds, 4 @ 400, 8 @ 500....

Think of two straight lines intersecting.

If you're going to do most of your shooting at 100, leave it zeroed there. The other option would be to zero it at like 500 (or another "long" range), and between 100 and 500 you'd be off by an inch or less. However, good luck getting that kind of accurate zero at 500.
Well i have my own 800 yard range but i'll be shooting at targets between 50 and 800 yards. So itd be a huge pain to have to adjust for windage even with no wind
i cant shoot until monday but when i do im gonna figure this out
im really hopin it works just like a scope in line with the barrel..
rifleman14 is offline   Reply With Quote
Old 06-07-2009, 12:48 PM   #20
Firearm Aficionado
 
Join Date: Apr 2009
Location: Indiana
Posts: 579
i just thought of something...the bullet is going straight out of the barrel so the scope has to match that. However, the scope is not directly over the barrel therefor the shot sould move to the left or right at greater distances(the bullet is a straight line and the scope, being offset to the left, has to be angled to intersect the bullets straight line). But i was thinking...the scope isnt a line its a picture or reticle. This two dimensional crosshair has to line up with the bullets trajectory and POI not a line from the scope. Would this affect the theory that at greater distances the shots would travel farther and farther to the right?
rifleman14 is offline   Reply With Quote
Reply

Gun & Game - The Friendliest Gun Forum on the Internet > General > The Powder Keg

Tags
mount, side

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 03:21 AM.




Recent Discussions

Connect with us!
Advertisement



"It don't cost nuthin' to be nice." -- Mike West