What is wrong with these rails?

[bigHUN]

Or I am wrong?

Couple years ago I got one Chinese QB79 (or something like that) wanted to build a franken rifle....this was my 2 or 3 winters long project, but I made it PCP and it was shooting amazing acuracy and efficiency up to 50.

The problem was with that 11 mm dovetail rail that ones I mounted a brand new 10-40x50 scope, the + and a laser bore sight dot projected @ 20 were apart about 2". OK, I forced the scope turrets to get that dot.

Then earlier this year I got the FX Impact, mounted that scope to the picatinny rail, I had to twist the rail max to L because of the 2" offset again.

Then I got a new scope 10-50x60 and mounted straight to that same twisted rail, and the + was bang on with the laser boresight. And also on that same rail

Then now last week I got a new P750, added a picatinny to 11mm adapter and mounted each, a Sig red dot, the old scope, the new scope, all the + is offset about the same 2" vs laser bore sight.

Do I have just a bad luck having a bunch of rails and scopes and looks like the machining all the holes (a dovetail, the picatinny and now again a dovetail) were off about the same amount and all to the L? or I am just a bit overthinking ;(

Edit:

btw, my scope rings were not cheap, and the couple picatinny I have these are at least UTG and better, also all the scopes cost a decent pile of greenies...and don't say anything about Impact (plus the addons and upgrades)....this game is a real money pit

 

[Odoyle]

Simple either bend the barrel or buy adjustable rings that have both Windage and elevation such as the expensive ones from Sportsmatch and others. 

You can even use your broken scope that Windage won't go any more with these specialized rings.

 

[biohazardman]

I noticed on my Impact that there was just enough wiggle room at the rear of the mount, on the gun, to move it far enough to one side so I could sight in near the center of my scope. So really not a bad thing when you consider all of the tolerances on the several parts, including the mount on the gun, breech, barrel, rings and scope, that are involved.

After that I found the dreaded barrel droop had me shooting far below my POI so I purchased a 20MOA rail and later on the FX No Limit rings. 

Machining the rail on the gun to accommodate this 20MOA droop would fix this but then FX would sell far less NO Limit rings so, although most of us would like to see this, I really don't see it happening any time soon.

Millet makes some inexpensive steel mounts, adjustable for windage only, also. Although they are no longer made in the USA.

https://www.amazon.com/Millett-Angle-Loc-Windage-Adjustable-Tip-Off/dp/B003R6N3L2

Looks like Weaver makes some windage adjustable units also.

 

[Odoyle]

I suggested he do that a month or 2 ago and it still wasnt enough for his generic cheapie ZOS scope (assumed broken) to zero so I suggested adjustable rings that has windage adjustments to allow him to manually point the scope there.

 

[lenweber2]

Anyone use the Burris Z rings with the inserts. Used to use them for PBers and one can adjust a bundle with different inserts.

 

[Odoyle]

I got couple of the new XTR ones and though a bit frustrating at times when adjusting the insert shims at they won't leave any blemish and so lapping rings not necessary if they aren't perfect. 

 

[bigHUN]

I noticed on my Impact that there was just enough wiggle room at the rear of the mount, on the gun, to move it far enough to one side so I could sight in near the center of my scope. ....

I could not believe it when I got my Impact back in March but as I see it now I am not the only one....feel relieved but this is still BS.

Then FX better slot those rigging holes, because I almost max them out as well.

I suggested he do that a month or 2 ago and it still wasnt enough for his generic cheapie ZOS scope (assumed broken) to zero...

The broken ZOS (broken L-R only) is on my franken project QB 22, I weld it there

I have the eaglevision infinity adjustable rings on the Impact with Falcon for H-L.

The next is again a project gun PP750 where I am trying to center a SIG red dot, also can get a spare reflex Eotech clone for cheap.