DIP 25 MOA Rail question

[Nickoglock2]

I just got in my DIP 25 MOA base for my new MKII, and I could barely see any taper in the base, so I measured it with a dial caliper and it is only .030 taller in the back. Does this make it a 25 moa rail?
All the bases I have had on Reminton 700s you could easily see the taper in them and they were 20 moa.
I just cant immagian 30 thousandths being 25 minutes, but this is my first rimfire tapered base, I just though the angle would be the same no matter what rifle it goes on..
thanks for any help, or a close up pic of yours. I can email you a close up if you like if need be.
I called DIP, and spoke to Bob he said .30 is about all it should be, just seems odd to me .
Nick

 

[Nickoglock2]

Re: DIP 25 MOA Rail question

It cant work, it has .027" of taper, a seekins R 700 base has .150" of taper.
As far as I can tell there is simply no way this is a 25 MOA base.

 

[Crash97]

Re: DIP 25 MOA Rail question

Stop and think for minute.

Approx. .03" worth of taper over 5 inches of base right?
That's roughly .006" taper/inch (.03" / 5" = .006)
.072" taper/foot (.006" x 12"=.072)....
300 feet in 100 yards right?

.072 x 300 = 21.6

21.6" @ 100 yds!

Pretty fuckin close to 25 MOA considering you measured with calipers!

You can't compare a base from a Remmy 700 because it has two different bridge heights and you MKII does not.

 

[Big Dog Steel]

Re: DIP 25 MOA Rail question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Crash97</div><div class="ubbcode-body">Stop and think for minute.

Approx. .03" worth of taper over 5in of base right?
That's roughly .006" taper/inch (.03" / 5" = .006)
.072" taper/foot (.006" x 12"=.072)....
360 feet in 100 yards right?

.072 x 360 = 25.92

25.92" @ 100 yds!

Pretty fuckin close to 25 MOA!
</div></div>

Uhm...not to nit pick but isn't there 3 feet in a yard, so 3x100 = 300' in 100 yards not 360

Also, 25moa is actually 26.175" @ 100 yards. Your total difference from front to back of rail for a 5" rail should be .0364".

 

[Crash97]

Re: DIP 25 MOA Rail question

Crap!

I was thinking degrees there for a sec.
Thanks and you are correct sir.
Edited above post...

 

[Nickoglock2]

Re: DIP 25 MOA Rail question

The base is 6" long which gives you .54 per foot, that gives you 1.08 in per 20 foot that is 16.2 moa. there is only 300 feet in 100 yards not 360.
So if my thinking and math is correct my base is either a defect, sent wrong, or being sold as as something that it is not. Then again I could be wrong, It would not be the first time LOL

 

[Nickoglock2]

Re: DIP 25 MOA Rail question

to be right on the base is 5.75 inches long, if you measure the heights at 5 inches the tamper is .023

 

[Crash97]

Re: DIP 25 MOA Rail question

The scope base pads that contact the receiver are approximately 5 inches in length on both the EGW and DIP.
How did you measure the pad thickness at 6 inches apart?

 

[Nickoglock2]

Re: DIP 25 MOA Rail question

U used the depth part of the caliper, but I edited above and I still think it is missing .010 to .013 of taper. maybe I need some rest, but It cant be 25 moa can it?

 

[Big Dog Steel]

Re: DIP 25 MOA Rail question

@ 5.75" it should be .0418" of difference from back to front of rail.

With a .03 difference over 5.75" I come up with 18.782" or 17.939 MOA.

 

[Nickoglock2]

Re: DIP 25 MOA Rail question

Osuarchitect, I like your rimfire targets I will have to get one of those once I find a range that will let me shoot steel..
I guess I am just stick with this 18 or so MOA rail I bought as a 25 moa, I dont really want to send it back at this point.

 

[Crash97]

Re: DIP 25 MOA Rail question

Every manufacturer sets their own tolerances on machined parts.
DIP may have sent one out the door with less than advertised MOA.
I wouldn't sweat it honestly. Do you need a true 25 MOA base or can you get by with a 21-ish MOA?
My opinion, just mount it and rock on brother...

 

[Nickoglock2]

Re: DIP 25 MOA Rail question

It is really about 18ish moa, but I guess I am going to use it, just seems a bit off, to buy something for a gun to be used for precision shooting and have it roughly 7 moa different that it is sold as.
I guess I could be called a bit anal, because I could not just put it on, I had to measure it because I noticed right away it did not look tapered at all to the naken eye, at first I figured they just sent the wrong one.
I am going to try to rock it, I will have to see where my 50 yard zero ends up I want to be able to use this out to 200 yards and ill need about 47 to 50 moa of elevation left in the scope for that.. we shall see..

 

[Crash97]

Re: DIP 25 MOA Rail question

Are you measuring the base taper with it mounted on the gun?
I don't trust the depth (beam end) of calipers to measure anything closer than .01" tolerance.
If so, are you taking into account any difference in the barrel and action diameters?
With the front of the base hanging over the barrel it would change your measurement if the barrel is a different dia. than the action.
Just curious as I cannot believe that you base is missing that much MOA.

Maybe try measuring the pads of the base with it off the gun if you haven't already.

 

[Nickoglock2]

Re: DIP 25 MOA Rail question

I have been measuring it all different ways it is either .023 or .025 of taper, With it off the gun clamping with the calipers is how I measured it at the 5 inch spread.
I emailed dip DIP.
I cant really let it slide because with my 50 yard zero with a flat base I had 34 moa of elevation left in my scope, with this base having 16 moa in it I will only get 48 now, which may put me a minute or 2 low at 200 yards. I am hoping either I or dip made a mistake, but im pretty sure my measuring is correct , I use calipers all the time building automatic transmissions. I cant see any way I am .010 off, aside from that ,
I dont even want to mount it because I am afraid they will not take it back..
I am going to do the match over again from scratch..

 

[Nickoglock2]

Re: DIP 25 MOA Rail question

just did it all again it have .024 or .025 of taper at 5 inches, measured 2 ways, I come up with 18 inches at 300 feet.. If it were 25 moa i would have 26 and change at 300 feet

 

[Aquatic_Robotic]

Re: DIP 25 MOA Rail question

Zeroed at 50 - at 200 I am up 24 with Wolf Match Target. I can out to 300 on 37 up zeroed at 50.

You should have plenty of elevation to get out well beyond 200.

This is on a DIP 20 MOA base.

Hope you get it sorted out.

 

[Nickoglock2]

Re: DIP 25 MOA Rail question

Correct 24 up at 200, not sure what I was thinking, even enough for 300 yards left with my current bushnell 3200 10x, I plan to trade out for a mueller apt or better, the bushnells parallas and focus just does not do well at 50 yards at all.
To be quite honest 300 with the .22 is above my skill level at this point, I have lots of practice to do, got to get decent at 200 first LOL