Rifle Scopes Mark 4 10X40

[210]

I've just came across a Leupold Mark 4 10X40, military version. It has the M3 knobs. Now having searched and read for a while, I need some confirmation on what I found to see if I'm thinking right.

The M3 knobs, with yardage numbers, are set ballistically to the M118 or M118LR. If the M118 weighs 173 grains, I'm assuming using the numbers will be no good using 168 grain BTHP and I'll have to work up my own dope.

I've also never messed with anything other than 1/4 clicks. Not having it mounted (waiting on stock), based on persons who have shot this particular scope, how close to center can one get to center with the larger adjustments. I really don't want to shim or anything like that.

Just looking for a little feedback from those who have more experience with the mark 4 M3 than I.

 

[Killswitch Engage]

Re: Mark 4 10X40

yes, you will need your own dope for anything other than m118lr which is 175gr. i have also not had any issues with bigger adjustments not being able to hit zero.

 

[Two Shoes]

Re: Mark 4 10X40

Should have 3-4 Dials...............just one?

 

[rthollenbeck]

Re: Mark 4 10X40

This may be obvious if you aleady know it but if you don't your just in the dark. So here it is!

From the rear of the scope(looking forward)

Top Turret is 1moa clicks. Elevation
Right Turret is 1/2moa clicks. Wind
Left Turret is Parallax (Focus)

The BCD Feature is a ring that locks in place on the outside of the actual turret. It should be marked for what load it is designed. It can be removed with a small Allen wrench. There are a few standard BDCs available and you can have custom ones made based on data you provide. The way the BDC works is you ignore the clicks and dial to the indicated distance you desire.

 

[Two Shoes]

Re: Mark 4 10X40

RT, Ignore the clicks?..............Don't think so.( use em' for finer tuning).
Unless your on KD course, and your Zero'd in.............and you laod is dead on.
And, I know you just mis-typed, but their BDC's...........

 

[rthollenbeck]

Re: Mark 4 10X40

What I ment by "ignore the clicks" is: The clicks value on the elevation is 1moa. The clicks do not correspond to the values engraved on the BDC dial.

I agree you can not book on the BDC....it is just a ruff guide(even with the corect load).

Sorry about the mis-type.

 

[Two Shoes]

Re: Mark 4 10X40

10/4,,,,,,,,,,,,,,,,,

 

[210]

Re: Mark 4 10X40

I'm tracking now, thanks for the help.

Also, is there aftermarket knobs I can get with the correct bdc for 168gr or do I have to go through Leupold?

 

[Two Shoes]

Re: Mark 4 10X40

Go to Leupold................they will need the Velocity and Bullet info you are using.

 

[Chuck0313]

Re: Mark 4 10X40

210,

I have the Leupold 3.5 to 10x40 with the M3 knobs. I like the Leupold line of scopes and this is one of their best. The biggest difference that I found with the M3 knobs(1 MOA) is that I can dial up my elevation quicker with the M3 knobs than someone with the target knobs(1/4 MOA). Both have their pros and con's. I might be quicker dialing up elevation and getting a round on target with the M3 knobs, but I am sacrificing some precision. Take this example. At 200 yards when placing the cross hairs in the center of a 2 inch circle, the impact is at the bottom of the circle. When I dial in one click up of elevation the impact is at the top of the circle. So with my 200 yard dope on I have to aim at the top of the circle to hit the center of the circle. For me hitting a half inch low when sighting in center mass is okay. However, if I were shooting a competition where a half inch was the difference between a hit or a miss, then I might go to target knobs which are more precise.

M3 knobs pay off at the longer distances where someone with target knobs might have to put in 2 or more turns of elevation and I only have to put in maybe 3/4 of a turn. This pays off when your dope is set at 100 yards and at the sound of the tone you have to drop from a standing to a prone, dial in your elevation and engage a target at 800 to 1000 yards.

 

[Swamper]

Re: Mark 4 10X40

If you are shooting for score, then whatever.

Shooting to live/survive, nothing better than the M3

There are several different .308 and .300win mag cams out there.

You can paint the cam and use finely-brushed nail polish to set your personal yardage zeroes. Should come with a .223, .308, .30-06, and .300win cam. Paint one you won't be using, most likely the 06. Having a custom dial made is about $125

The Leupold fixed power scopes are hard to beat for elevation adjustment, good light transmission, and lightweight. You probably won't need a canted scope base with a fixed power mk4 m3. I use Warne Maxima weaver style bases on my win 70sa with a mk4 m3. Gives me about 60moa of elevation from a 200yd zero and the scope retains very low profile and perfect spot-weld.

I am pretty critical of the heavy, Zeiss spotting scope lens quality, expensive and long "sniper scopes" that are so much in popularity here. Sure, they are wonderful instruments, but... An 18lb 308win is hardly a choice for mobililty. The .25 or .1moa turrets, even corresponding to the reticle are not battlefield friendly. Fast & rugged is "better" imho, than heavy and deliberately slow. After all, a sniper does not need to do better than minute-of-ribcage. Prefer to keep weight about 12.5 to 13lbs with a heavy palma contour barrel. Actually prefer a heavy barrel AR-10T w/4.5-14 mk4 TMR illum reticle for all the marbles. 20rds and 14lbs, with the 60000 mk4 scope is a winner.

 

[jtv3062]

Re: Mark 4 10X40

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 210</div><div class="ubbcode-body">I'm tracking now, thanks for the help.

Also, is there aftermarket knobs I can get with the correct bdc for 168gr or do I have to go through Leupold? </div></div>
The m3a should come with 223rem 55 gr, 308 win 168 gr, 30-06 180 gr, 300 win mag190 gr cams.

 

[sobrbiker883]

Re: Mark 4 10X40

If I recall correctly, the older covered M3(CW) MK4 10X's had one knob for M852 (168gr) and another for M118 (175gr). One was 308M and one was 7.62 marked. Also, one was in yards and one was in meters.

Been a while since I had mine, and I gave away the extra knobs I had, so I can't clarify much better than that.

With one MOA elevation clicks, you will be able to zero within 1/2moa.

 

[210]

Re: Mark 4 10X40

I got it used from a friend and he didn't have the extra knobs with it is why I was asking. Did come with an ARD and both an IR and polarizing filter. If I can get it zeroed to within a 1" circle, it's good for what I need it for.

My PRI 20 MOA base and low rings also put that thing way up in the air. Swamper states that I can get away with a no cant base. If so, that should put me lower to the bore axis. I will probably never need the 1000 yard adjustment but 500 and in is probable.

 

[Graham]

Re: Mark 4 10X40

I think the adjustments on the MK4M3 the same as on the M3A: Elevation is in 1 MOA and windage in 1/2 MOA. The military BDC is for 118SB with 100 meter adjustments, but the dials are interchangeable: Get and install the civilian "Federal Match" dial for a 168gr SMK at 2600fps.