Remington 7600 scope mount issues??

[NYH1]

I finally got to take my new Remington 7600 Carbine 30-06 Spr. to the range to sight it in today. It shot great groups, bullet holes touching at 25 and 50 yards. However it shot 3 inches low at 25 yards and about 7 inches low at 50 yards with the elevation on my scope all the way up. The windage was perfect. I didn't even bother wasting ammo to shoot at 100 yards, which is where I'm going to zero it. I took everything apart to make sure everything was correct. I reassembled it and got the same results.

This is my set up-
Remington 7600 Carbine 30-06 Spr. (as mentioned above).
Leupold VX-II 2-7x33mm Scope.
Redfield one piece Mount (dovetail front, windage screws rear).
Leupold low Rings.

I was told I could use the Leupold Rings on the Redfield Mount, I'm having second thoughts on that now. All my other scoped guns have Leupold Mounts and Rings. One has a two piece mount all the rest have one piece mounts. I've never had any problems with any of them. I had a Redfield one piece Mount with Redfield Rings (dovetail front, windage screws rear) on my Winchester model 88 that I traded for my new 7600 Carbine. I didn't have any problems with the model 88 mount or rings.

So, should I get Redfield Rings to put on my Redfield Mount? Or should I get a Leupold Mount to use with my Leupold Rings? Are the dovetail front, windage screws rear Redfield Mounts and Rings supposed to be interchangeable with Leupold Mounts and Rings?

Thanks in advance, NYH1!

 

[T.R.]

Both of my 760's have two piece Millett sculpted bases and engraved rings. Zero problems for me.

TR

 

[NYH1]

I made a shim to put under the rear of my one piece mount. I put it between both the rear holes/screws of the mount. I worked fine. I picked my son up from school today and we went to the range. It's shooting pretty well at 100 yards. I'm going to get a few different types of ammo and bullet weights. Maybe fine tune it a little.

Now I don't know if I should leave the shim that I made on it or order some of Leupold's shims and put them on instead.

It's a nice shooting carbine that's for sure. I shot about 20 rounds through it today and even with the hard plastic butt plate and wearing a tee shirt recoil wasn't bad at all. I was shooting Remington 165 gr. PSP Core-Lokt's and Winchester 165 gr. PSP Super X. ammo.

NYH1!

 

[hoghunting]

Don't use the shim under one side of the base as the base is no longer level and the scope is now bent to match the base. Replace the rings with the Burris Signature rings with the polymer inserts. You might also need the offset insert kit, but this will allow you to align the scope to the barrel without out stressing the scope tube.

 

[GooseGestapo]

I don't think "hoghunting" is familar with the Leupold/Burris ONE PIECE base.

The rings "dove tail" into the front by swiveling, and the rear ring is held by two screws on either side of the bottom of the ring. If the shims are under the base, the very, very rigid base will "distort" the top of the reciever of the 7600 before it will bend and distort the scope.....

I think you my need to check and see that the front and rear rings are the same height. You may have a mis-matched set of rings, or one that is out of "spec". I've got two M98 Mausers (one military/sporter, other a MkX) that have Redfield bases and Leupold, Burris, and or Millet rings. They do interchange in this instance. However, the way that the rings were boxed from the mfg's, its possible that if they were in a retail shop, they could have "migrated" to/from different boxs and may not be a "matched pair" of rings. I bought my base and rings for the MkX from a shop in downtown Orlando, Fl in 1975. They had to go through a dozen boxes to find me a set of medium rings to fit the one piece base, and I had to get a gunsmith to "make" the screws for the rings as they had been "pilfered" from the boxes......

I've heard of such problems with recent Remington/Marlins with the recievers drilled and tapped for the barrel crooked causing the now infamous "Marlin" barrel "droop". Rem/Marlin has even been shipping the guns with "shims" for the scope bases if you choose to "try" to scope then. However, they will also replace the reciever if you return the gun to them..... Well documented on www.marlinowners.com.
Not sure if the same "gremlin" has infected the 7600 line.

 

[sansone]

I agree with goose, you may have a mismatch. I have scoped a few 7600's with one-piece and two-piece bases and never had a problem.

 

[NYH1]

I had these rings on a Leupold one piece mount on my Marlin 336C 35 Rem. with a Leupold VX-II 2-7x33mm Scope and they worked fine. No shims, no trouble at all. They're Leupold low rings that I bought when I bought the mount for my Marlin. If the rings are out of spec then the mount for the Marlin was out of spec too in the opposite direction, which I don't think was the case. The scope sits in the lower rings nice like it should with no binding or anything like that. I think either my Redfield mount or my rifle itself is out of spec. As long as the shim won't cause any damage (which it doesn't appear it will) and stays true I'm fine with it. I cleaned the threads and put blue loctite on them when I mounted the mount when I put the shim in. I have it shooting pretty well now. I'm going to try a few different brands and weights of ammo to see what it likes.

Thanks, NYH1!

 

[NYH1]

I forgot to mention. I have Leupold medium rings on both my Remington 700 BDL 223 Rem. and my 700 Classic 280 Rem. and there is a noticeable difference between the low rings and medium rings.

NYH1.

 

[hoghunting]

I don't think "hoghunting" is familar with the Leupold/Burris ONE PIECE base.

The rings "dove tail" into the front by swiveling, and the rear ring is held by two screws on either side of the bottom of the ring. If the shims are under the base, the very, very rigid base will "distort" the top of the reciever of the 7600 before it will bend and distort the scope.....

I am very familiar with the Leupold bases and if the base is not level on both ends, the scope is forced to bend to match the base. The rings will mount on an unlevel surface causing the problem.

If you want to see where the problem lies, pull the scope and rings off and check the base. Remove the rear base screws while keeping the front screws tight. See if there is a gap between the rear of the base and the receiver. If there isn't, remove the front screws and replace and tighten the rear screws, then check for a gap under the front of the base.

If there isn't a gap under the front or rear and you install a shim under one side of the base, you will distort the base causing the scope to bend in matching the unlevel base.

 

[NYH1]

It's a one piece steel base that's over a 1/4" thick. You really think that putting a small shim under the rear of the base and tightening it down with the four small 8-40 (IIRC) screws to 20 to 30 "INCH POUNDS" is really going to bend the thick steel base causing the scope to bend too? I wonder why Leupold sells and recommends the shims if needed while continuing to warranty the scopes for life.

 

[sansone]

quote:
"I cleaned the threads and put blue loctite on them when I mounted the mount when I put the shim in. I have it shooting pretty well now"

sounds like you solved the problem, I'm glad, now enjoy shooting it

 

[DKeener]

The barrel to receiver attachment on the 7600 is not nearly as sturdy as a typical bolt action. Your gun might be on the shy side of tolerance. Close enough for the installed sights but not enough for the Scope mount. Could be the scope mount too or a combination of mount, scope, and rifle tolerances the add up on the negative side. Remington has no idea of the type and specs of any equipment you might add.

Shimming would be the proper fix

 

[NYH1]

quote:
"I cleaned the threads and put blue loctite on them when I mounted the mount when I put the shim in. I have it shooting pretty well now"

sounds like you solved the problem, I'm glad, now enjoy shooting it

The barrel to receiver attachment on the 7600 is not nearly as sturdy as a typical bolt action. Your gun might be on the shy side of tolerance. Close enough for the installed sights but not enough for the Scope mount. Could be the scope mount too or a combination of mount, scope, and rifle tolerances the add up on the negative side. Remington has no idea of the type and specs of any equipment you might add.

Shimming would be the proper fix

The shim has solved the problem so far. I'm going to try a few different types, brands and weights of ammo to see if my gun likes then better then the two types I've tried so far.

NYH1!

 

[jimma]

My 7600 in .308 (purchased Aug '11) has the same problem (shot 12" low at 50 yds with scope wound all the way UP). Tried different mount, rings and scope before settling on a shim. My conclusion...the rifle is out of 'true' at the scope base mount area! The gun now shoots <1" groups at 100 yd, but I don't like the shim!

 

[NYH1]

I don't care for the shim either. I also got a bad rattle out of the blue one day. I'm on the fence as to whether or not I want to take it back. Part of me wants to get it fixed and part of me doesn't want to take it apart because it's shooting so well, 1 1/4" groups at 100 yards with 165 gr. Fusion's. The more I shoot it the better it shoots. It's an awesome setup and has become my favorite big game hunting rifle/carbine!

NYH1.