This started out as a Light Load Q.
Light loads to me would be 1oz or 7/8ths...going at a moderate speed.
Now we are talking 1 1/4oz pushing 1300 fps...not a light load to me.Recoil might be harsh?
But I only load for clays....can't say I've ever fired 1 1/4oz loads....don't need em....could be rough on the gun in volume???
good luck
franc