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I finally pulled the trigger on a RFB which has been at a local dealer for about a year. He dropped the price to $1299 so I had to take it home. I picked up a Steiner P4xi 1x4 illuminated scope for $400 (another great deal) and mounded it in a Burris P.E.P.R fixed mount.

I shot a variety of ammo, Wolf 145 grain, Herters (Tula) 150 grain, Black Hills 168 match, Hornady TAP 168, and Hornady Zombie Max 168.

Initially gas setting with the 145 grain was b+4 and b+10 for the 168. After about 100 rounds I had to open the gas to +6 for the russian stuff. I assume it broke in a little and needed less gas.

50 yard sight in, shooting over a back pack produced a 1" group with the 145 grain pills. I moved back to 100 yards and fired three shots from each brand of ammo and saw groups Around 2". The Black Hills match had two bullets in a 1/2" group with the third round no where to be found. I don't know if it was over the top of one of the first rounds or not. I shot a second 5 shot group from this box, and had one center punch on the 1" dot, and the remaining four rounds were in a 1.5" group 5" below it!

Subsequent shooting began to show vertical stringing. When I got home I found the front rail screw was loose which could had caused shift in poi. I will attempt further accuracy testing with the 168 black hills fodder, as well as some 175 black hills match to see what sort of accuracy we can achieve with this setup. I know the optic will be a limiting factor, and may try a higher magnification optic if I find a round which the gun really likes.

So far the gun has been very reliable (when gas is set properly), real world accurate, and relatively low recoil for a .308. I'm glad I made the purchase and am anxious to see what potential this rifle has!
 

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Yep, had the front sight rail screw back out when mine was new also. I wish they had put 2 screws there, or a larger one. Use red locktight and torque that screw to 38-42 inch/pounds That was from a factory tech, I published a very long time ago here, let me see if I can find the original thread.

EDIT: Found it.

Standard torque for a screw that size is around 30"#, KT ramped that number up quite a bit so the don't go over 42"# warning was not a joke as that is about all the threads will stand in that size screw:)

"Got a response from KT today. 38-42 IN/LB, do NOT exceed 42 IN/LB. Use red #262 locktite. The front screw is 1/4" long and the rear screw is 3/8" long, don't mix them up"

The rail is a structural weak link on this rifle IMO. Because of that I don't really care for the PEPR mount and it's cantilever/overhung mass on this rifle. It was really designed for the 5.56 AR with its noticiably lesser recoil. The RFB recoil is soft on your shoulder for a 7.62 but a lot of energy is moving around. There is a slomo video out there somewhere of someone shooting the RFB with a PEPR. It is not a very good quality video, but it is plainly obvious that the scope in the PEPR moves around A LOT in the video during recoil. Structurally, triangles are your friend for rigidity...
 
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