Drats!!

I finally got out to sight in my b-14 HMR and couldn't do it. I had a 20 MOA rail on it and at the 100 yard mark I couldn't dial down the scope far enough. At the farthest down I was still 4 Mils high at 100 yds. (about 14"). This was also serving as a barrel break in so just for giggles I used my 4 mil dot and was punching them into the 1" bull with a few outside (crappy 125 gr Winchester range ammo that I got just for the brass.
When I got home I installed a set of Weaver bases and reloaded the empty cases with H4350 and Hornady 143 gr ELDX bullets. I started at 39.5 gr up to 40.5 gr in .5 gr increments.
Will keep y'all posted.

What scope? That don't seem right at all brother.

If your scope has a zero stop it is very likely blocking your ability to dial down enough.

Feed us some info and we will Sherlock Holmes this pile of stinkey brown stuff that comes from #2 hole! Heck yeah no rule 4 violation here folks!

Yea something is off if you can't dope down to sight in at 100 yards. Sounds like you have a 40 moa base rather than a 20moa base.

Mach 1 said:

Yea something is off if you can't dope down to sight in at 100 yards. Sounds like you have a 40 moa base rather than a 20moa base.

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That could very well be. The package did say 20 MOA rail. Does anyone have the dimensional difference between the front and rear of the rail (700 SA)? I'm going to go check it out. And yes my scope does have a zero stop - Mueller.

I just did some measuring of my rail. The front of the rail has a height of. 0.262" and the rear measures 0.409". That's a difference of 0.147". That seems like an awful lot of difference for a 5" long rail for 20 MOA. By my calculations that's about a 50 MOA rail!!!
I just looked at the rifle and that difference in height has to account for the difference in the receiver height in front and in back of the bolt. The rail is also stamped 20 MOA Remington 700 SA. The B-14 specs call for 700 bases but I bet there is a difference in the receivers.

I have messed with several B-14s and 700 20 moa rails have done just fine. I can measure them when I get home in front and rear but I have never had an issue at all and from playing with turrets they all have been around the 20 moa mark.

It's your zero stop. Stop overthinking it. If you want to check, turn the turret all the way down. Then count the clicks all the way up. Almost guaranteed the zero stop is set about halfway through the total internal adjustment. It needs to be adjusted when you sight in.

My 20moa rail has a height difference of .049" front to back about 5.5" apart

Schnyd112 said:

It's your zero stop. Stop overthinking it. If you want to check, turn the turret all the way down. Then count the clicks all the way up. Almost guaranteed the zero stop is set about halfway through the total internal adjustment. It needs to be adjusted when you sight in.

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Nope - the turret is down all the way. My rail difference between front and rear is .147". I called EGW and talked to Zach in technical asking his what the difference was and I was right on the money.
He told me for out to 500 -600 yards a flat rail is fine. Beyond that he recommends a 20 MOA rail and sight in for 200 yards. He also said that if I used a 10 MOA rail and I was 14" above my POA at 100 yards with the 20 MOA I would be about 4" high 100. With that being the case, I could use a 10 MOA rail and use the first MIL dot above my center reticle and be almost dead on at 100 (3.6").

How much total ele does your scope have? How much can you actually count? I'd bet it IS your zero stop and you don't know how to tell. I've got lots of rifles with 20moa bases and 100 yd zero's......

Clem Bronkoski said:

I just did some measuring of my rail. The front of the rail has a height of. 0.262" and the rear measures 0.409". That's a difference of 0.147". That seems like an awful lot of difference for a 5" long rail for 20 MOA. By my calculations that's about a 50 MOA rail!!!
I just looked at the rifle and that difference in height has to account for the difference in the receiver height in front and in back of the bolt. The rail is also stamped 20 MOA Remington 700 SA. The B-14 specs call for 700 bases but I bet there is a difference in the receivers.

Click to expand...

So if you do the math. A 20MOA Rail At 5 inches should be .029 not .147
20 moa is 20.94" @ 100 yards
20.94" / 100 = 0.2094" per yard
0.2094 / 3 = 0.0698" per foot
0.0698 / 12 is 0.0058 per inch
0.0058 * 5 is 0.0290'' end to end over 5 inches

Or from the Machinist Handbook

Or 20 MOA over 5 "
20 MOA is 1/3 of 1 degree over 5 inches is
20MOA(0.33333) x pi /180 x 5 inches = 0.0290"

R700 footprint actions are lower in the back of the receiver than the front. Even 0MOA rails differ in height from front to back. I have mounted 20MOA bases/scopes on a lot of R700 footprint actions, from cheap to top tier, and never had a problem getting a 100 yard zero.

Another vote for 0 stop issue.