Ken, I have had several guns come in lately that the scope mount is off to one side or the other so far that it is not possible to adjust the windage screws to compensate for the difference. I have milled a couple mounts to correct this, but is there easier way that you or anybody does to fix this ill. I had a Black Diamond come in that the drilling for the scope mounts was out of line, that one I recommended he return to T/C. I figured I could plug it and re-drill, but on such a new gun I figured T/C would replace it and make it right anyway. I have a Colt .44 mag in the shop now it has a Redfield scope and a one piece rail on it. The customer brought it in bottomed out on the windage and it is still at least 4 inches off on the collimator. I could put adjustable rings on, but the gun, scope, base and rings are all the same camo pattern and he doesn’t want to change anything. Any Suggestions Mike
Good questions, when the scope base is installed crooked and you don’t want to plug and re-drill and tap for whatever reason you can alter the bottom of the scope base so the base itself leans the direction you need to move the scope. Now the scope can collimate. NOW with that said, someone will call us or e-mail us and say that the base is not in line with the barrel and so if the gun is sighted in at 100 yards it will be off at, say 200 yards. This is true but remember that it will not be enough to worry about on a basic hunting rifle/handgun and your customer won’t even be able to tell. (Most target shooters won’t be able to tell either). Remember that the guns produced today are made in mass quantities on computer operated machines, they are very good, BUT NOT PERFECT, your TC is an example of this. MANY factory guns (and custom guns for that matter) are not plumb with the bore. The above mentioned fix can alter the point of impact by quite a bit, up to 12 inches depending on what type of bases you’re altering. The other method of repair is to drift the existing scope base hole the direction needed with a small burr in your Foredom/Dremel tool, now take the correct drill for the next size tap and drill the hole so it is round and true. Re-tap to the larger size and the base will now sit true. Hope this has helped, if not keep asking and we’ll get you squared away.
Answer:
On this particular set-up, you can machine the bottom of the 1 piece base so that it tapers from rear to front. If you need to go, say 10” down at 25 yards and the rings are 4” apart, you will need to make the base .048” thinner under the front ring than under the rear. – Jack
