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Picture of Cowboy_Dan
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I recently mounted an optic on my Mosin-Nagant using the jMecks mount and z-plates. For those of you who are not familiar, this mount places the optic to the left of the axis of the bore as well as above. I can get it sighted in at 50 fairly easily, but when I shift over to 100 I'm not even on paper. Do I just need a larger target, or does anyone have any tricks I can try? I wonder if the problem is the scope offset or the trajectory rising over the top of the target?


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Cowboy Dan's a major player in the cowboy scene. -The Mouse
 
Posts: 164 | Location: Northern Indiana | Registered: 27 April 2013Reply With Quote
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sounds like the scope isn't parallel to the bore
 
Posts: 13466 | Location: faribault mn | Registered: 16 November 2004Reply With Quote
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Picture of jwp475
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A larger target that the bullet hits will help.


_____________________________________________________


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Posts: 5077 | Location: USA | Registered: 11 March 2005Reply With Quote
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Picture of Mike_Dettorre
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I agree with butch something is way wrong.

Shoot it at 25 and 75. I bet you will find the bullet impact is right or left at 25 and then the opposite at 75.


Mike

Legistine actu quod scripsi?

Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.




What I have learned on AR, since 2001:
1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken.
2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps.
3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges.
4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down.
5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine.
6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle.
7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions.
8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA.
9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not.
10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact.
11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores.
12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence.
13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances.
 
Posts: 10181 | Location: Loving retirement in Boise, ID | Registered: 16 December 2003Reply With Quote
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Picture of Cowboy_Dan
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quote:
Originally posted by Mike_Dettorre:
I agree with butch something is way wrong.

Shoot it at 25 and 75. I bet you will find the bullet impact is right or left at 25 and then the opposite at 75.


It's too bad my range is only 25, 50, and 100. Any other way I could check for this proboem? I did some measuring with a plomb line using the iron sights as a reference and it appears to be ok. I know it's not the rifle and I don't think it's the opperator, since the pair put 5 rounds from 3 different loads touching in a + shape from 25 when I was testing the bed job.

I think the next time I take it out, I will mark 2 points of aim on an unfolded box. One near the top, the other closer to the bottom. Take 2 shots at one and 3 at the other and see what that can tell me.


___________
Cowboy Dan's a major player in the cowboy scene. -The Mouse
 
Posts: 164 | Location: Northern Indiana | Registered: 27 April 2013Reply With Quote
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