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Jeff,
The 20 MOA bases have 20 Minutes Of Angle built into them already. Badger, USO, Ferrell, plus another 10 or so I can’t remember off the top of my head manufacture them.
The problem with specifying the 168 MK is that Sierra designed them for the 300 meter international game. The military use the 175 MK in 7.62. It gets to 1000 a whole lot easier.
Don’t have enough time to keep very current on the long range rifle work, or shooting in general. Try .22lr at 200 yds or so. Roughly comparable to .308 at a 1000. .22lr being more forgiving on range estimation and less so on wind with few .22lrs being able to hold 1.5 MOA at that distance.
S/F, FOG
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