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I got a new EGW Picatinny scope base for my Savage 110 long action flat back receiver yesterday.

For some reason, when I trial fit the rail one of the screws did not want to come out and the head began to strip. I figured I might as well just comitt and snugged the rest of the screws down and I installed the rings. I got the rings lapped (kokopelli lapping and alignment kit). So last night I was stweing over what to do. I had to get the damn screw out and managed to get it out this morning after a good night's sleep. I got a new set of screws on order from EGW.

This morning, I decided to install just the rear screws and see how the front end looked. That's when I noticed there was about a .030" gap between the rail and the receiver. I can spring it like a diving board. i'm guessing I'll have to either bed it or settle for it being slightly tweaked when snug. I already got the rings lapped in that condition anyway. The good news is that it only took a few minutes to lap the rings and they were nearly perfectly aligned from the start. After a couple of minutes of lapping, alignment was dead on.

I can probably shim the front or stone the back to fit the scope perfectly and I am willing to do that if I have to. If it comes to getting a replacement base, I'm willing to go with a different type of base. I really don't want a 2 piece and prefer a one-piece. I take it people may prefer round base Savages to avoid these kind of fitting issues? At this point I don't know if the mount is out of spec or the receiver. It's from the mid-80's.

I have a kokopelli scope mounting kit and I got the rings lapped in nicely. When I installed the alignment bars, the long rod that tells you if the scope is in line with the bore indicated that there's a slight angle to the right in relation to the barrel. It's not gross, but it's there. When I look over the top of the barrel, the alignment rod is angled to the right but doesn't overhang the barrel.

Since it's a picatinny base, I can't adjust the yaw of the base so I guess I'll have to settle for the misalignment. Any comments or suggestions on this one? The ring alignment bars line up perfectly.

I'd like to do it right the first time instead of doing it over a second time.
 

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sometimes these things happen, the problem could be in the scope base, or the reciever, or a combination of the two. easiest solution is to bed the base to the reciever. im more concerned with the problem involving the screw. if the screw wasnt to blame, i would be running a tap in all the holes, but most guys dont have 6-48 taps laying around, and degrease/clean the holes.
when bedding the base to the reciever, only use 1 front and 1 rear screw and only lightly snug them. that way tightening the screws wont ditsort the base.
 

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Discussion Starter · #3 ·
Thanks for the info Lefty..

Here's the gap I was seeing. I measured .018" with a feeler gauge on the side and I added some shim stock in the front. I ended up having to add a .005" shim to the front and rear and somehow everything founds it's happy place. I'm guessing I didn't need that much shim under the front because it's rounded which must have multiplied the effect of the shim. I put .015" worth of shims at first and the rear was WAAAAAYYYYYY high after snugging down the front screws. I kept subtracting .005" until I only had one .005" shim under the front which gave me a perfect .005" gap at the rear so I threw a .005" shim under the rear so now the mount is stress free.







My ring alignment is still good to go...


Here's the slight offset in barrel alignment (don't let the shadow on the ground fool you). I can't correct this unless I get some different rings with windage adjustment. I think it will do for now but the real test will be at the range.



I also levelled the action in a vise later and checked the level of the scope mount. It has a slight twist to it. The center of the base is level but if I slide the level to the front, the bubble shifts just slightly to one direction but the bubble is still within the center marks. If I slide it to the rear, the bubble shifts the other direction and is off center in the opposite direction as the front but again, still within the center marks.

God, I wish I was a machinist.....ICONROLLEY

I'll update my results in the other thread. We'll see how this turns out later...
 

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I had to solve your EXACT SAME PROBLEM two years ago.

I went with the DNZ game reaper mount in medium size. After mounting my 3-9x40 I would have used the low mount but it is still very near perfect setup.

I got mine from midwayusa but here is the link to the manufacturers page..it has a good chart on what size scope you intend to mount and what size mount will give the best fit.

http://www.dnzproducts.com/index.ph...id=208&zenid=8369b11d8ed8bb4111b9baf02b55d369
 
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