Need help with base screw size

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26 February 2008, 08:36

BuddyK-9

Need help with base screw size

Recently purchased a Winchester Classic 70 in 338 WM. It has dual dovetail bases front and rear but with what appears to be 8-40 screws. The bases and rings front and rear are exactly the same, no rear with windage screw. Are the screw heads on 8-40 and 6-48 the same? The 8-40 measure .0170 across the threads? The bases appear to be Leupold. When you re-thread to 8-40 what do you get for bases with correct head size and hole diameter?

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26 February 2008, 16:49

tsturm

quote:
Originally posted by BuddyK-9:
Recently purchased a Winchester Classic 70 in 338 WM. It has dual dovetail bases front and rear but with what appears to be 8-40 screws. The bases and rings front and rear are exactly the same, no rear with windage screw. Are the screw heads on 8-40 and 6-48 the same? The 8-40 measure .0170 across the threads? The bases appear to be Leupold. When you re-thread to 8-40 what do you get for bases with correct head size and hole diameter?

Re drill & countersink what ever bases for #8 screws