POF P308 scope rings

[Guest]

I have a Leupold Mark 4 LR/T M3 3.5-10x40 on the way and I already have a Larue QD LT-104 SPR-1.5 mount for it. I am being told that mount is going to be way to high due to POF's rail being higher than normal......

What rings or mount should I be using with the above scope on my P308? I also have Diamondhead folding sights on the gun that the scope will need to clear but I want the scope as low on the rail as possible.

Thanks in advance for your help.

 

[redirt78]

At one point I had a 50mm objective scope with 30mm tube and Badger 1.125's that fit just right with Butler creek scope caps. I think irons might have fit up under it also but can't say for sure. Just some info that might help, not exactly what you need to know though. That was when I was running the full length top rail also.

 

[Guest]

Thanks for the input. I also have the full length top rail on mine. I just don't want to buy rings or another one piece mount and it not fit correctly.

 

[redirt78]

That 1.5" Larue will not be good for a proper cheek weld even if you were running it with a PRS adjustable stock.

 

[JRM83]

My Vortex Viper PST with 50mm objective only barely clears the top rail in 1.25" Seekins Rings. That is as low as I can get it. With the POF and the increased rail height getting that optic as low as possible might be a good idea.

 

[RyeDaddy]

Gave you bad info before, but looks like you're on the right track now below.

Here is a pic of my POF P-308 with a 30mm tube, 40mm obj Leupold in a Badger Ordnance 1.3" Unimount. The gap between objective bell and rail is 0.3". With 1.1" height rings you would still have room for Butler Creeks, but just barely.

 

[Guest]

Sorry, the scope I purchased is actually a 3.5-10x40 not 44.

 

[ORD]

Sorry, the scope I purchased is actually a 3.5-10x40 not 44.

The objective diameter of that scope is 2.0" or 50.8mm.

Using the basic formula for calculating ring height, the minimum ring (or mount) height needed for that Leupy to clear the monolithic POF rail, with room for scope covers, is 0.47" from the base to the bottom of the scope tube, or 1.06" from the base to the mid-line of the scope tube/rings. Now, as for clearance of BUIS, the rear Diamondhead is 0.45" tall when folded (rounding up), you are going to need a good bit more height on your rings to clear the eyepiece of the scope which will only be ~0.25" or so MAX off the rail if you mount with the lowest rings possible. Thus, you are looking at having to go from ~1.1" rings give or take to ~1.3" or perhaps even slightly higher rings to clear the BUIS.

Personally, owning a couple different P-308 rifles...I'd skip the @#$% BUIS altogether in lieu of a lower, more appropriate scope mounting position because put simply, you are sacrificing a lot for the novelty of having a back-up sighting system that will more likely get mounted and then NEVER used! Yes, the fine folks on BARFCOM may tease you about your lack of BUIS on the rifle or question your true commitment to "battlefield preparedness," but in the long run...the rifle will work better for you without them!

 

[deersniper]

The Larue locking mechanism won't work right on a Pof rail

I used a 3.5-15x56 and I think ultra high NF rings on a p308

I used a NF 2.5-10x32 with ,885 NF rings on a 556 POF. This works perfect. No room whatsoever under the scope but you get a perfect cheek weld every time.

 

[Guest]

The objective diameter of that scope is 2.0" or 50.8mm.

Using the basic formula for calculating ring height, the minimum ring (or mount) height needed for that Leupy to clear the monolithic POF rail, with room for scope covers, is 0.47" from the base to the bottom of the scope tube, or 1.06" from the base to the mid-line of the scope tube/rings. Now, as for clearance of BUIS, the rear Diamondhead is 0.45" tall when folded (rounding up), you are going to need a good bit more height on your rings to clear the eyepiece of the scope which will only be ~0.25" or so MAX off the rail if you mount with the lowest rings possible. Thus, you are looking at having to go from ~1.1" rings give or take to ~1.3" or perhaps even slightly higher rings to clear the BUIS.

Personally, owning a couple different P-308 rifles...I'd skip the @#$% BUIS altogether in lieu of a lower, more appropriate scope mounting position because put simply, you are sacrificing a lot for the novelty of having a back-up sighting system that will more likely get mounted and then NEVER used! Yes, the fine folks on BARFCOM may tease you about your lack of BUIS on the rifle or question your true commitment to "battlefield preparedness," but in the long run...the rifle will work better for you without them!

ORD, thank you for the detailed information. Exactly what I was looking for. I am going to remove the BUIS and just go with 1.1" or close set of rings to get the Leupy as close to the rail as possible.

I am looking at the NightForce 1.125" UltraLight Titanium Ring Set - NF1125UL for $165.00 at OpticsPlant.com. Anything better you can suggest? Looks like the Medium NF rings are too low at 1.00".

 

[ORD]

The NF ultralight rings are very nice indeed. The only other thing you might consider, depending on what max distances you plan on shooting your rifle, is to get the Badger 22MOA AR riser (which is 0.375" high by itself) and then get a set of low rings that will make up the addt'l 0.725" or so of height you need to clear the objective/rail. I have used this option successfully on several rifles, including one of my P-308s in the past and it works VERY well.

 

[Guest]

At what distances would the riser come into play? I don't plan to shoot past 600 yards. Im new to long range/precision shooting so I dont know what the riser will do for me and at what distances I need it.

 

[ORD]

At what distances would the riser come into play? I don't plan to shoot past 600 yards. Im new to long range/precision shooting so I dont know what the riser will do for me and at what distances I need it.

You won't need the canted base to reach out to 600yds (and a ways further than that actually). The Leupy has ~65MOA of total elevation travel although I have seen a few that were closer to 60 (so...~32.5MOA of elevation adjustment from mechanical zero for dialing in corrections at longer ranges). Depending on how much of that adjustment range you use up getting zeroed, you could, at least in theory, end up with only ~25-30MOA of adjustment to get from a 100yd zero out to your max distance before you run out of adjustments which won't get you to 1k. Out to 600, you'll be AOK with a flat base/plain rings and your given optic.

 

[Guest]

Great news. I can always sell these rings and go with the riser and low rings in the future if I find myself wanting to shoot at 1000yds. I just ordered the NF 1.125" rings which will be here Saturday or Monday.

RyeDaddy, with the NF 1.125" rings I ordered that should give me enough room for the scope and caps I believe. The scope comes with Leupy caps.

 

[Guest]

Of course every retailer I went to has all the Nightforce Titanium rings in stock except the 1.125" rings. I ordered them through the only vendor I found having them in stock and they called me an hour later telling me they actually don't have them in stock but will receive them Friday or Monday.

 

[Guest]

Received my rings and B.A.D. Ambi safety lever today. Got everything installed and Im very happy. Scope just barely cleared the rail.

Will take it out to the range tomorrow and see how she shoots. Only put about 40 rounds of SA ball so I will put another 40-60 rounds of ball through it to break it in then see how she groups with match ammo.

 

[ORD]

Looks good!

Glad you've got her up and running!