It is not a stupid idea, Tonofun, but it simply will not work! The fact is the regulation requires the barrels to point LOW, and CROSSED in relation to the point of aim on the traget. The reason for this is; There is a little thing called BARREL TIME involved! IOW, the rifle depends on the recoil, and bullet speed, to place the bullets on target properly. Change the weight, or ballance of the rifle,or the load, and it usually throws the regulation off! This is why if you mount a scope on a double that wasn't regulated for it, the regulation is usually upset greatly.

Believe me, the lazer has been tried, but is only usefull for gaining a starting point, by adgusting the barrels to an educated guess, to begin the regulation process! The lazer is used by about all makers in a jig to start the process, but the old trial&error is still required to get the job done. The regulation is not THE major cost, however,it is considerable, in the building any double rifle worth owning. The fitting of a double rifle's action parts is parimount, far more than it is for even the finest shotgun.

Take a barrel set from a double rifle, and lock them in a padded vise, with the sights on target at the distance it was regulated for. Then place two empty cartridge cases , without primers, in the chambers, then look through the primer holes, like a PEEP-SITE. What you will see is, the RIGHT barrel will be looking at a point to the LEFT of the POA, and LOW , and vise-versa for the left barrel! This is necessary because when the RIGHT barrel is fired, the rifle will rise up, and to the right, and again the left barrel will do the opposite, and the amount of time the bullet stays in the barrel durring recoil, will dirrectly effect the POA on the target, at a given distance! If the load is too slow, the group will be high & wide, if too fast it will be low, and crossed. Change anything in the load, or the weight, and ballance of the double rifle, and you will likely open, or close, and the composite group be high or low!

As someone above stated the regulation is as near as is possible made to shoot available factory ammo. The problem is, no matter how well regulated the rifle is, for factory, it is simply a "one size fits all" sittuation. Any double rifle that is worth owning is worth working up the ultimate load for it. So, your job, as owner, is to get the best out of the compromise regulation done at the factory, by fine tuneing the loads to your particular rifle!

The cost of a fine double rifle is the team of highly skilled artisans with their files, and ability to do the average of 400 man hours required to build a double rifle. When one considers the wages for a tool&die maker, who still doesn't have the skill to build a double rifle, it is a wonder to me, why double rifles aren't more expensive than they are!