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| I am certainly not an expert here, but I will pass on a bit of knowledge I picked up --------- there are 2 different spacings for the rear screw holes on a 70. A large one-- which is "standard" these days and a "short" .330 spacing that was made for magnum length actions pre 64. I would check the spacing on the screws. I am guessing that it is .330 and you can use the magnum set-up. If thats not the case----sorry, just trying to help. |
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| Wouldn't this be a simple matter of replacig the two rear windage screws provided they have the same threads as the old? That is the groove you're talking about, right? |
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| Zach - The heads of the old windage screws are smaller than the current design. He is referring to the circular "groove" that is machined into the sides of the base. I know this because I have an pre-war M70 base with a bent windage screw and can't find a replacement. |
| Posts: 1366 | Location: Houston, TX | Registered: 10 February 2003 |
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| Oops. |
| Posts: 1366 | Location: Houston, TX | Registered: 10 February 2003 |
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| Aarghhh! |
| Posts: 1366 | Location: Houston, TX | Registered: 10 February 2003 |
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| Gotcha.
I was thinking about his statement that the groves in the rings did not match. Failed to think about the corresponding groove in the base. |
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| Posts: 767 | Location: Phoenix, Az | Registered: 31 May 2001 |
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| RNS, Good grief! The pre war spacing from rear receiver ring screw to the one bridge screw was most likely 4.100, some were 4.093. Space between front scope ring socket and clamp area for the rear scope ring should be the same as the replacement base. Width of old rear ring was about half that of front ring. Rear base-depending on when it was made could have a step down corresponding to the end of the old ring. The screws had a different head diameter and thread. Head was about 11/32 diameter and thread most probably on your base was 8 x 40. The cone angle inside the windage screw heads where they clamp the ring is the same cone angle and will have the same effective clamping force as those on the new base even if part of the rear scope ring hangs over a step down in the old base. Can we assume that the front ring turned into the socket for it in the old base and that your concern ( or some of it) was the gap between edge of screw head diameter for original base screws and those fingernail clipping (in appearance) machine cuts on the new ring? Cheapest and nicest appearing way out is to open up the old base threads for the windage screws to 3/16x 32 and turn the head diameters down to fit the counter bores for them in the base if that is still a matter of concern. |
| Posts: 199 | Location: Kalispell MT. | Registered: 01 November 2002 |
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| I'm sure I have a old Redfield base that will work for you. I might even trade you the base for the rings...email me and lets see what we can do...I will need the specs... |
| Posts: 42203 | Location: Twin Falls, Idaho | Registered: 04 June 2000 |
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