You can figure it out advance, We had a formula posted on this forum but can't find it just now and am away from my notebooks for a few days.  In any event it's just like Iron sights except the sight radius is whatever the scope block distance is.

From memory only with 36 inch sight radius .01 movement is a Minute of Angle so using normal 7.2 inch scope block distance one minute of angle  on a scope needs 1/5 of .01 movement.  If your Malcom style scope has a wider spacing it would be different. Thats the Sight part of the problem.

Then you need the ballistic part of the equation, how much sight adjustment is required for different ranges with your bullet.  Thats avalable with either computer ballistic programs or in Lymans Cast Bullet Handbook. The CBH is so fast usefull I gave up on the computer programs.

There is the practical way to figure it out. Shoot the rifle at shorter distance. Say 100 yards with you sight all the way down then crank it up to the max and measue the strike on target. difference in inches is your range in MOA.  Going back to the Lyman Cast Bullet Handbook tables it's possable to calculate sights with a fair degree of accucary, Used to be some 25 yard targets avalable for the 30 Cal service round that gave sights at distances.  You can do the same thing on a big piece of cardboard using a black marker and vertical line with a round aiming point inked on.

Somebody may have the exact formula at hand but you get the idea.

Boats

Wayne it might be easier to determine maximum adjustment range at 25 yards. It would certainly require a much smaller target to record two groups than what you'd need at 100. I would use a very large piece of cardboard, about 3 feet square, and place a 1" paster about 1/3 up from the bottom. It would be nice to know what the full range of adjustment for the mounts might be but it's not what you really need to know. What you're looking for is the amount remaning after you've sighted in at 100 or 200 yds. Sight in at 25 on the paster, and if the mounts do not have a vernier type scale measure from bottom of the scope tube at mount to the mount base or barrel with dial calipers, now adjust to maximum elevation and fire a 3 shot group. You should still be on the cardboard. Measue the distance between the center of the bull and the center of the group in inches and multiply by four. This number will be the approximate number of Minutes of Angle remaining in the scope's adjustment range from a 25 yd zero. If you then measure how much the scope has moved or read the scale on the mount you can determine the ratio of movement in .01" to MOA or interpolate from the mount's markings. Paste up the bullet holes and take the target to 100 yds. Move the bullseye to the center and without adjusting the scope fire a 3 shot group. Measure from the center of this group to the center of the bull. Subtract the number of inches in that measurement from the number of MOA of adjustment that remained at 25 yds. You now have the amount of adjustment remaining from a 100 yd sight in.

When I get home I'll send you a link to a ballistics program on the net that seems to work with my 40-65 when I need to calculate sight settings. If the bullet you are using resembles a Hoch 409-405 its ballistic coefficient will be around .420 if its closer to the Lyman Snover it will be around .485. You can crank the appropriate BC in to the program and calculate the adjustment you'll need at all the ranges for silly-wet.

 

Like you say it's not difficult

Only thing I would caution is after you make the calculation prove it on paper. Like Old Blue said 25 yards is plenty if you are carefully about measuring center of impact.  Each 1/4 inch is one MOA.   

Other thing we do to get guys on paper at match distance quick is to shoot at the berm using a couple of guys spotting. Best target is a Shotgunners orange clay pigeon.  The spotters need to be able to estimate bullets strike in MOA so you can quickly change the sight

It's a progression, calculate, prove the calculation short. Check it on dirt at distance then get match sights on the match target at the required range.

I would also use the  standard 7.2 inch spacing. Shorter is for a modern scope. One reason they are short is the internals have much less range of adjustment possable so they need a shorter spacing to get the required adjustment range. Also makes the need for precise movement movement more critical too.

Boats