200-300 MOA adjustable rails

[fiftybmg]

I'm looking at adjustable rails to add 250 MOA.

So far, from what I see, the 200 MOA Valdata RAM looks like a good choice. Not the best choice, but good because of price, I can get it locally, and the MOA settings are lockable, immovable and appear to be repeatable. Downside is it's 50 MOA short, but I know a very talented machinist to enhance it to 250.

I would appreciate feedback on any similar range extender rails used, what you put them on and how they track. So far google-fu has revealed stories a few years old of micrometer-type units that don't track well, but are fine for a one-distance setup.

I'd like confirmation that I'm on the right track with this type or rail, that it is suitable for reliable field adjustments.

I hatched a cunning idea to take a .375 RUM with a 300 grain .695 BC at 2900 fps to 2 miles. On paper, I need 230 MOA at my altitude, the rail is 20 and the scope has 100 total. At sea level the calculator says I need 281 MOA, hence the 250 rail.

 

[Mooseknuckles]

Found this article on Precision Rifle blog, maybe it can help you out.
https://precisionrifleblog.com/2018/08/05/extreme-long-range-tips-optics-mounts/

 

[adam32]

Tacom HQ Charlie tarac

 

[dfanonymous]

Tacom HQ Charlie tarac

I second this ^

 

[Mach 1]

How deep of pockets do you have?? Buy the new March genesis tactical scope and let me know how it works. Has 400 moa of elevation adjustment.

 

[Rum Man]

Tagging in

It looks like I need 261.2 moa or 76 mils
For two mile .

Rum Man

 

[fiftybmg]

Found this article on Precision Rifle blog, maybe it can help you out.
https://precisionrifleblog.com/2018/08/05/extreme-long-range-tips-optics-mounts/

Thanks, I saw this. Charlie Tarac and March are unaffordable for me.

The 2019 top place at KO2M had a fixed rail, machined to taper.

 

[adam32]

Thanks, I saw this. Charlie Tarac and March are unaffordable for me.

The 2019 top place at KO2M had a fixed rail, machined to taper.

He wasn't shooting a 375 RUM either...

 

[fiftybmg]

The 375 RUM is not a 2 mile caliber, but it's going to be fun to try. There's a 30 inch barrel looking for something to do.

If I tinker with it for a year, and only end up with a consistent one mile or one and a half mile shooter, it'll be a year well spent.

 

[Rum Man]

I say go for it ! Sounds like a great time to me . I have a quest to hit 2 miles too , it's been fun working my way up !
I'm getting that Adj base here very soon .

Rum Man

 

[adam32]

The 375 RUM is not a 2 mile caliber, but it's going to be fun to try. There's a 30 inch barrel looking for something to do.

If I tinker with it for a year, and only end up with a consistent one mile or one and a half mile shooter, it'll be a year well spent.

I know, I mean he was shooting a bullet with much less drop so he could get away with a slanted base and still make it work with a giant cheek riser...imagine how big of a riser you will need to get proper eye alignment? Not to mention you'll most likely be seeing your barrel in the bottom half of your field of view.

I would personally be looking into around a 150moa base plus a scope with another 100 and with a MOA reticle for another 50 or so in it instead of making it all up with a huge base.