22lr long range course moa size

[customones]

am going to put up a 22lr long range course out to 400 yards. the question i have is keeping the target size accurate ie comparable to 1moa per hundred yards of a 308. so doing this would i compare drop values in moa of the 22 to the 308 and use that distance to base the target size? meaning the 308 drops 10.5 moa at 500 would i use that 10.5 moa on the 22 figure out where that impacts and put the 5 moa target there? hope this makes sense and thanks for the imput.

 

[Dylan in AZ]

Re: 22lr long range course moa size

I think I get what you're asking and the answer I'm thinking of is finding a good coparator of the two rounds and their drop charts. A better way to personalize this is to make your own drop charts or if you want the easy way, go to JBM Balistics and find all your info there for free. I would sugges getting a chrony tho if you don't already have one and inputting real data and you will get he most accurate results from this method that way.

Hope this helps,
-Dylan

 

[TOP PREDATOR]

Re: 22lr long range course moa size

i use my comparison to the drop of the .22 as to the .308 (with match velocity 22 ammo)
http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1330910#Post1330910

i think there are two ways of looking at this. simulating by drop or simulating by groups size (MOA)

by group size, i'd just use any targets, and shoot at different distances with the .22 until you get 1" groups - this becomes your simulated 100 yard .308 distance. 2" groups - simulated 200 yard .308 distance, and so on.

my .22 is truly only MOA (groups size wise) at 50 yards (where it is zeroed), so to roughly equal my .308 that i know is MOA at 100 yards (where it is zeroed) and based on drop of my .22, i better be getting - or at least shooting for - groups at the below sizes to match the .308 moa group sizes at their respective distance (simulating by drop):

2.4" at 100 (equals .308 at 240 yards)
3.8" at 150 (equals .308 at 380 yards)
5.1" at 200 (equals .308 at 510 yards)
6.3" at 250 (equals .308 at 630 yards)
7.7" at 300 (equals .308 at 770 yards)
8.8" at 350 (equals .308 at 880 yards)
9.8" at 400 (equals .308 at 980 yards)

it's the same principle as you used in your original post, only you were working furthest distance inward, i'm working shortest distance forward. but you have to figure out your .22 stuff from where it is actually zeroed and actually shooting MOA so that it is equal to what the .308 is doing. so your example of 10.5 moa of drop has to start somewhere, and should start from where your .22 is shooting moa and is zeroed.

i still haven't seen a truly consistant MOA group at 100 yards with a .22, and to build a range based on a consistant 100 yard MOA performance with a .22 is throwing off the numbers from the start.

i don't know if that'll help you any.

 

[nmmi9100]

Re: 22lr long range course moa size

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: customones</div><div class="ubbcode-body">am going to put up a 22lr long range course out to 400 yards. the question i have is keeping the target size accurate ie comparable to 1moa per hundred yards of a 308. so doing this would i compare drop values in moa of the 22 to the 308 and use that distance to base the target size? meaning the 308 drops 10.5 moa at 500 would i use that 10.5 moa on the 22 figure out where that impacts and put the 5 moa target there? hope this makes sense and thanks for the imput. </div></div>

A minute of angle is a minute of angle. It doesn't change for caliber. Whether it's a 308 or a 22LR.

At:

100 yards, 1 MOA = 1"
275 yards, 1 MOA = 2.75"
400 yards, 1 MOA = 4"
550 yards, 1 MOA = 5.5"
1000 yards, 1 MOA = 10.4"...rounded to 10"
1 mile, 1 MOA = 17.6" (rounded)

-David
Edgewood, NM

 

[customones]

Re: 22lr long range course moa size

Top predator sorry for the ambiguity I think your approach will work just fine thanks for taking the time to give your perspective on this. Nmmi9100 thanks for the reply but I think your chart suggests inches per hundred yards not moa,but your right about moa not changing from 22 cal to 308.

 

[haptoshoot]

Re: 22lr long range course moa size

I've been thinking about this very topic lately.

Since one of the real training benifits to shooting the 22 is practice/learning wind reads.

It seems to me that the most benificial comparison would be to use time of flight to target, or comparable wind drift for a given wind speed.

 

[haptoshoot]

Re: 22lr long range course moa size

Here is the chart I've been using to compare my bolt 308 to my bolt 22lr.

308 (175 SMK @ 2600)
Distance Time Wind drift
100yds .12sec .73 inch
200yds .25sec 3.02 inch
300yds .39sec 7.04 inch
400yds .53sec 13 inch

22 (40 @ 1080)
Distance Time Wind drift
50 yds .14sec .81 inch
87 yds .25sec 2.56 inch
125yds .39sec 4.72 inch
175yds .53sec 8.95 inch


Groups size also seem to line for those yardages
Group sizes for my 308 at 100 are similar to group sizes at 50 for my 22
Group sizes for my 308 at 250 are similar to group size at 100 for my 22

 

[haptoshoot]

Re: 22lr long range course moa size

Just read toppredators post.
Our conclusion are similar using different methods.
Hmm

 

[bribri]

Re: 22lr long range course moa size

tag

 

[nmmi9100]

Re: 22lr long range course moa size

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: customones</div><div class="ubbcode-body">Top predator sorry for the ambiguity I think your approach will work just fine thanks for taking the time to give your perspective on this. Nmmi9100 thanks for the reply but I think your chart suggests inches per hundred yards not moa,but your right about moa not changing from 22 cal to 308. </div></div>

With the capabilities of virtually all shooters other than benchrest, IPHY = MOA for group purposes. For comeups, there's a difference when you are dialing lots of elevation.

Yeah, sure 1 MOA = 10.47" at 1000 yards. Find me someone that can shoot consistently to a 0.05-MOA resolution at 1000 yards and then the difference will matter. At 500 yards, we're talking 5.24" is 1 MOA instead of 5". True MOA matters for dialing comeups on a scope when you are talking 30 or 40 MOA but for group size, it doesn't matter, outside of Benchrest.

-David
Edgewood, NM

 

[nmmi9100]

Re: 22lr long range course moa size

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: haptoshoot</div><div class="ubbcode-body">I've been thinking about this very topic lately.

Since one of the real training benifits to shooting the 22 is practice/learning wind reads.

It seems to me that the most benificial comparison would be to use time of flight to target, or comparable wind drift for a given wind speed. </div></div>

Agreed. Time of flight seems to make sense to me.

 

[coues7]

Re: 22lr long range course moa size

great info.