[lone ranger]

Firing a M52C for first time today, with Redfield #3200 mounted way out on the barrel.....at the top of my elevation adjustment and need to come up at least 4"to have my zero and another 6" @100 yards. Have read where a adjustment may be made at rear base but don't know if this would be between barrel and base or exactly what.........thanks! l.r.

 

[man of steel]

Get some Burris signature rings and an offset kit. Well thats the best choice at least. Tapered base is another option. Shims will work but can introduce alignment stresses on scope(assuming the rings were aligned to begin with) If shims are used you should lap the rings(or for that matter they should be lapped anyway unless you use Burris Sig rings)

 

[Ackman]

Don't........

Don't shim two piece bases. And you don't want to be maxed out on elevation adjustment just to get POI where it's supposed to be. If the scope is maxed out now and POI is still 4"-6" low, shimming and lapping isn't the right thing to do. Go to www.burrisoptics.com, look at the Signature ring section, and see a diagram that explains scope ring alignment perfectly.

 

[Oleman]

Shiming.

Like Ackman says don't go there on two piece bases.

 

[TinMan]

Use different barrel blocks

they come in several different heights. They usually cost about $15 each or so. The correct height depends on the Model, "C" in your case, and the barrel on that rifle - Standard, Heavy or Bull. The blocks are usually, but not always, marked for height on the underside. Also, if you had the blocks off, make sure you didn't exchange front for back when reinstalling them. Check places like Creedmoor, Neil Jones or other 22 target rifle vendors.

 

[rgitzlaff]

Shimming AR-15 mount..

On the subject of shimming scope mounts. I plan on shooting to 1000 yards with my 6.5 grendel AR and I will need some additional elevation to accomplish this. Right now I use a one-piece base and rings all together attached to the flattop, can I glue some shims under the rear of that base to give me the cant that I want? Or possibly I could machine a cant into the bottom of the mount if I can get a friend to do that for me. The mount attaches right to the pic rail on the flat top of the reciever. I think the only problem with this might be the clamping of the base to the gun would not be totally even with shims in the rear. What are the thoughts on this?

 

[Chris K.]

Right now I use a one-piece base and rings all together attached to the flattop, can I glue some shims under the rear of that base to give me the cant that I want? Or possibly I could machine a cant into the bottom of the mount if I can get a friend to do that for me. The mount attaches right to the pic rail on the flat top of the reciever. I think the only problem with this might be the clamping of the base to the gun would not be totally even with shims in the rear. What are the thoughts on this?

That won't work. There isn't than much difference between the existing grooves in your mount and ones you're proposing to machine. We're talking thousands of an inch difference here. Everything would run together. Scrap the one piece mount, buy a AR15 riser/extender from GG&G or ARMS and then put medium Burris Signature Zee rings with the correct offsets to give you the elevation you want.

Chris