I use 1.5 min less elevation from 200 to the 300 yard line
Have you actually CHRONOGRAPHED those moly loads?
Wouldn't less sight elevation indicate the bullet staying in the barrel LONGER?
Therefore slower velocity?
The longer the bullet stays in the barrel (and is affected by recoil), the higher it prints on the target.
So, you need less elevation on the gun.
For example, 125 grain +P .38 Special ammo gets out of the barrel real fast, and requires MORE ELEVATION to get the point of impact to the same point of aim as a much slower 158 grain bullet.
(And we are talking close range, so trajectory is not a factor)
It has long since been determined that moly does NOT have any effect plus/minus on accuracy. You may have a moly load that is more accurate in your rifle. But, it isn't more accurate because of the moly. It just happens to be more accurate.
There is evidence that moly makes cleanup easier on some rifles.
I went 4000 rounds on a Krieger AR-15 barrel with moly ammo, and never used a brush in the bore.
Just mop-out the chamber and pull two patches with Break-Free through the bore.
That gun barrel was X-ring accurate from Day 1.
The throat has now started to show distinct "alligatoring" (now at about 10,000 rounds).
I ran out of moly ammo, and I'm using non-moly now.
That barrel is still turning-out high-master scores.
No fliers.
The crown and the rifling near the muzzle still look perfect.