Scope mounting solutions

[youp50]

The mount failed to hold the scope after three shots. The typical confusion that follows a failed mount or scope. I was starting some maintenance and noticed the oil marks where the scope was. Screws were checked and were tight.

I am leaning towards a steel Picatinny Rail. I would like to maintain the current distance above the bore.

I do not have scope ring lapping rod. It will arrive sometime this week.

We have discussed scope mounts before, could we please do it again?

The loads were 300 gr Hornady over 60/6 H4198/sr4759 BCR sabot. First three shots were a sub MOA one hole group.

[olegburn]

youp50,
on couple occasions Leupold techs told me to wrap scope with strip of paper (regular notepad).
Just one layer.
I always did and never had a slippage.
Lapping may or may not help.
Paper did for me.
olegburn

[rossman40]

You do not have a failure of the mounts or the mount-to-ring but the failure of the ring to hold the scope. Seeing the oil tells me you may not have had the best of contact between the scope tube and the ring and of course the oil didn't help. If you look after taking off the ring caps you may see your only getting a small percentage of contact. I think lapping helps to get maximum surface-to-surface contact. After that anything like rosin, tape, the paper trick or the neatest thing I seen was a dielectric paint, would help to improve the "grip". A new one I have heard is teflon pipe tape, just a small strip on each ring half, sounds interesting. I would imagine cutting it down with a exacto knife or scissors so it wouldn't be visible would be a bear.

[artjr338wm]

Youp50, have you given any thought to considering Burris's Weaver style "Z" rings? They are the ones that have a plastic insert ring that encapsulates the scope tube and at least in theory, makes for maximized contact and holding power between the scope ring and the scope tube.

I have them on all my rifles EXCEPT for my 10ML and the reason I did not use them on it was because i simply at that time could not find a set in nickle finish in med height, went with the Warrens and they have served me well.

It is worth noting I went to the Burris's because my scopes slipped while in two other types of rings. Since going to the "Z" rings i have had no scope slipping or issues at all. I currently have "Z" rings on two 12ga slug rifles, a 338wm, a 7mm STW, a 300wm, a 209x50 and a 6.5x55 Mauser.

I plan on getting a scope better suited for hunting for use on my 10ML-II and that is when I will also use "Z" rings on it.

[mike3132]

Lap your scope rings and this wont happen. Easy to do and takes less than 10 minutes. Since I started lapping rings several years ago scopes don't slip and I very seldom use any kind of adhesive. Mike

[fishhawk]

A lot was discussed in the past about mounting scopes. Some important highlights were, use steel weaver style base(s)(very strong), bedding bases because the action is finished with a belt sander that makes the contact area very inconsistent, if using bases with multiple slots mount the rings as far apart as possible, use steel rings and lap then or use Burris Signature zee's, if using non signature rings the paper in the rings works fine, remove all oil from the ring and scope contact area. One of the reasons for lapping or Burris signatures is caused by action taper from the belt sanding. My gun has bedded 2-piece Burris Extreme Tactical bases ( they have multiple mounting slots like a picatinny) and the Burris Signature Zee rings

[pposey]

either the Zee Signiture rings or the regular Zee's have always worked for me, regular Zee's will mark your scope though if you crank them down, the sig rings with the inserts will not,,, I like warne steel bases and sig Zee rings

[10ga]

I use electric or plastic tape in the rings. I can get 3 rolls for $1 at the local $ store and they are different colors. Put tape on the rings and trim to fit with a blade or x-acto etc... just leave a bit of space for take up where the rings meet. When I started this I didn't have any more slippage problems. Just started to break scopes. Shotgun slugs, inlines with 130 gr Swiss FFF, and ML IIs with 300 gr boolits are tough on scopes. Of course the ones sent back were still under warranty and were fixed or replaced. Took less than 10 shots per to find the weak scopes. If they make it through the first range session they don't fail later. I keep a roll of the tape in my field box for the range and have lent the tape out many times to people with shifting scopes. Always solved the problem. 10 ga

[youp50]

Managed a range session yesterday. I did the paper thing. Managed around an inch and a half, which was fine considering a wind gusting to 25 and veering from a quarter to full cross.

Thanks all.