Ive got the one with the P4FL - best scope I own to date - I have a bunch of SB 5-25's (5 off) , a SB 3-27, a SB 12-50 and a NF Beast - I use it on one of my 300PRC's , it really is an unfair advantage, but then again you cant hit what you cant see (full discolsure I also have a Vortex Gen2 , which is relegated to a gas gun)