shimming scopes? ok or bad idea ??

madman25

madman25

CGN Regular
EE Expired
Rating - 100%
1   0   0
i just got a new 6500 4.5-30 tactical, good deal too got it for 850, new store in langley bc, rocks, now i got the leupold std rings to go on my 15moa base i already have. but given this scoped adjustment range i am thinking it wouldn't hurt to have it canted forward a bit more, and i have some shim stock handy, but am worried this could try to bend the scope.

is this a bad idea or an ok thing to do?

on another note i now will be selling my 6-24 4200 milldot

thanks for the info
 
Why do you feel you need more cant on the setup? What range and what calibre are you shooting? Without knowing this its hard to say. Personally, I'd avoid the shims and run a base with a greater cant.

TDC
 
its a rem 700 308, shooting either 178 amax or 185 vld, i would like to be able to hit 1000m
this will roughly require 50 min of vertical adjustment, the scope has 50, so half that is 25 plus the 15 from the base gives me 40, another 5 - 10 would be nice, from my first basic calculation i would need a 0.015 shim if i was to use this method
 
madman25 said:
its a rem 700 308, shooting either 178 amax or 185 vld, i would like to be able to hit 1000m
this will roughly require 50 min of vertical adjustment, the scope has 50, so half that is 25 plus the 15 from the base gives me 40, another 5 - 10 would be nice, from my first basic calculation i would need a 0.015 shim if i was to use this method
Click to expand...

I just ran the numbers from Hornady's website through the JBM online calculator. With a 200 yard zero, you'll need 32 MOA adjustment to get out to 1000. If you have 25(half the available range of the glass) plus 15 base, you're looking at 40 MOA. That gives you 8 MOA to zero with as far as elevation is concerned. Even with a 100 yard zero you only need 34MOA.

Regardless, I agree with the above, if you're going to shim, shim the base(s) not the rings/optic.

TDC
 
using the same calculator i am getting 37 MOA with a 178 Amax at 2650 fps and 200 yard zero, and i still need to adjustment to actually zero the scope, so i think i will shim it under the base in 3 spots with 5,10 then 15 thou shims placed at 1/3 , 2/3 and the back of the base respectively this should give me all the range i need to go from 100 out to 1200 yards where my load will go subsonic(atmosphere dependent)
 
madman25 said:
using the same calculator i am getting 37 MOA with a 178 Amax at 2650 fps and 200 yard zero, and i still need to adjustment to actually zero the scope, so i think i will shim it under the base in 3 spots with 5,10 then 15 thou shims placed at 1/3 , 2/3 and the back of the base respectively this should give me all the range i need to go from 100 out to 1200 yards where my load will go subsonic(atmosphere dependent)
Click to expand...

I'm getting 2775 from Hornady's website. Is your velocity measured from your rifle perhaps?

TDC
 
i see that on the hornady site , how in the high hell are they getting it to go that fast their 168 load isnt that fast, thats crazy i am using 43.3 grain Varget and only about 2650 or so. That is awful fast for a factor load, i wonder what powder they are using to get that velocity
 
I wouldn't bother with the graduated shims, put the big shim under the back of the base and be done with it. You could even use more shim, as long as you have enough elevation to get to the close range zero you want, everything else is just wasted, right?

It's a one-piece rail, right?
 
You must log in or register to reply here.
Back
Top Bottom