Go to Chuckhawks.com there is a section on optics, specifically, objective lense size and light transmission. Check out the review of the Burris Signature Select scopes. I searched and searched for a scope for my 280 Rem. Here's what I found out. First, the signature select line is still produced in the USA (I like that). Burris uses a quad seal for waterproofing which is supposed to be better than an O-ring. They use dual springs where most use a single, They offer a lifetime warranty. Finally, 50mm objective lenses aren't going to give the human eye a noticeable difference in the amount of light transmitted. As someone else stated in this thread, a 50mm sits just too high on your gun for me. I went with the Burris (as if you didn't already figure that out) 3-10x40mm ballistic plex $395.00 Opticsbestbuy.com. Also, if this is to be a permanent mount check out Leupold bases with their PRW rings. Good luck Jeff.
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