They work just fine and you can buy them from Brownells. Never needed them on anything but a 375 H&H RSM as the scope was short OAL and the action a true Magnum length.

Never needed any on any of my #1s at all. Perhaps if you have a different style of mounting a rifle or a scope with critical eye relief they might come into play.
They are butt ugly !

Top one is 7x57 with Lupy 2-7

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300 H&H w 6x36 Lupy

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Hey NSAQAM, Larry is very "IN", LOL
You also dishonor the 28th division by using the unit patch as an insult.
As for the liar, welcher Bricktop, his day is fast approaching.
Coward trolls won't accept PMs.
How's the phantom "campfire" coming ?